Case : ThermalTake VH4001BNS DH104/BK/ALU w/ LCD 7'' TOUCH $685.00
Thats just hilarious :D
Okay to clear a few things up:

P55 and P67 series chipsets (not X58) are dual-channel. Meaning, using 2 sticks of RAM gives you double the memory bandwidth. This is why it is REALLY recommended to use 2 x 2GB RAM sticks unless you already have a 4GB memory stick with good speeds lying around (which I doubt). You need DDR3 RAM of course, with a speed of 1066-1600. These 4GB kits are getting much cheaper than before. Buying brands is better than bog-standard memory since the brands tend to come with cooling, are more stable, are overclockable, and allow you to overclock the CPU higher.

Now the graphics. Radeon HD 6790, GTX 460, GTX 560Ti. These are the cards you should be aiming for with such a budget. I have a GTX 260 and that has no problem playing everything on highest with no AA @ 1920 x 1080 (except Crysis 1 and Metro 2033, of course). Do NOT, I repeat, do NOT, get a Radeon 5xxx series card, not with the 6 series offering better performance for lower prices and lower power consumption.

This will help you much than I ever can: http://www.guru3d.com/article/vga-charts-spring-2011/
This article compares 52 recently released graphics cards in multiple games. Check it out.

By the way, overclocking a graphics card is probably the easiest thing ever. Just dial up speeds with programs such as RivaTuner, MSI Afterburner, etc... until you get glitches then back down, stress test for 1 hour, and you're good to go. A good stress test program is OCCT. I got a 20%-30% boost with my GTX 260 with overclocking. Now it approaches GTX 280 / 285 speeds. Good way to save a few bucks too.

Now about Core i3, i5, and i7. Core i3 is dual core only (with integrated graphics in the CPU). Core i5 is both dual core and quad core. Core i7 is purely Quad core / Hexa-core. Core i5 2400 is basically the same as Core i7 2500 / 2600 save for slight differences in clock speed, no hyperthreading, and no unlocked CPU multiplier (who cares?). Basically, it's a good way to save money by going Core i5 2500. Do NOT get P55 motherboards as they are old gen. Get P67 / H67 / Z68 boards. Core i3 / i5 / i7 CPUs with 3 digits (Core i3 530, Core i3 540, Core i5 655K, Core i5 750, Core i5 760, Core i7 860, Core i7 870, Core i7 875K, Core i7 920, Core i7 930, Core i7 940, Core i7 950, Core i7 960, Core i7 965X, Core i7 970, Core i7 975X, Core i7 980X, Core i7 990X) are ALL old gen (Bloomfield & Gulftown). Get the Core i3 / i5 / i7 2xxx series. They are the new gen (Sandy Bridge).

If you have any questions, ask me by email. I can guide you through.
wow,thanks yasamoka for your help! :)

so,
VGA:I think I'll go with the 5830
CPU:basically i'll go for the 2400
RAM:I will get 2*2Gb Kingston DDR3
mobo:so confused,I'll leave it till the end

about overclocking the VGA,yea,it's great,I overclocked my 9500GT:
GPU:614Mhz
shader clock:1450
and about it's temp:normally it's at 38-39,gaming:it reach 45-46
yasamoka wroteOkay to clear a few things up:

P55 and P67 series chipsets (not X58) are dual-channel. Meaning, using 2 sticks of RAM gives you double the memory bandwidth. This is why it is REALLY recommended to use 2 x 2GB RAM sticks unless you already have a 4GB memory stick with good speeds lying around (which I doubt). You need DDR3 RAM of course, with a speed of 1066-1600. These 4GB kits are getting much cheaper than before. Buying brands is better than bog-standard memory since the brands tend to come with cooling, are more stable, are overclockable, and allow you to overclock the CPU higher.

Now the graphics. Radeon HD 6790, GTX 460, GTX 560Ti. These are the cards you should be aiming for with such a budget. I have a GTX 260 and that has no problem playing everything on highest with no AA @ 1920 x 1080 (except Crysis 1 and Metro 2033, of course). Do NOT, I repeat, do NOT, get a Radeon 5xxx series card, not with the 6 series offering better performance for lower prices and lower power consumption.

This will help you much than I ever can: http://www.guru3d.com/article/vga-charts-spring-2011/
This article compares 52 recently released graphics cards in multiple games. Check it out.

By the way, overclocking a graphics card is probably the easiest thing ever. Just dial up speeds with programs such as RivaTuner, MSI Afterburner, etc... until you get glitches then back down, stress test for 1 hour, and you're good to go. A good stress test program is OCCT. I got a 20%-30% boost with my GTX 260 with overclocking. Now it approaches GTX 280 / 285 speeds. Good way to save a few bucks too.

Now about Core i3, i5, and i7. Core i3 is dual core only (with integrated graphics in the CPU). Core i5 is both dual core and quad core. Core i7 is purely Quad core / Hexa-core. Core i5 2400 is basically the same as Core i7 2500 / 2600 save for slight differences in clock speed, no hyperthreading, and no unlocked CPU multiplier (who cares?). Basically, it's a good way to save money by going Core i5 2500. Do NOT get P55 motherboards as they are old gen. Get P67 / H67 / Z68 boards. Core i3 / i5 / i7 CPUs with 3 digits (Core i3 530, Core i3 540, Core i5 655K, Core i5 750, Core i5 760, Core i7 860, Core i7 870, Core i7 875K, Core i7 920, Core i7 930, Core i7 940, Core i7 950, Core i7 960, Core i7 965X, Core i7 970, Core i7 975X, Core i7 980X, Core i7 990X) are ALL old gen (Bloomfield & Gulftown). Get the Core i3 / i5 / i7 2xxx series. They are the new gen (Sandy Bridge).

If you have any questions, ask me by email. I can guide you through.
Yes i agree with you yasamoka that gtx 260 is a very powerful card but it also needs one hell of a power supply and it produces too much heat . As for the radeon 5770, it is nothing in front of a GTX 260 or anything else.
omar_killer wrotewow,thanks yasamoka for your help! :)

so,
VGA:I think I'll go with the 5830
CPU:basically i'll go for the 2400
RAM:I will get 2*2Gb Kingston DDR3
mobo:so confused,I'll leave it till the end

about overclocking the VGA,yea,it's great,I overclocked my 9500GT:
GPU:614Mhz
shader clock:1450
and about it's temp:normally it's at 38-39,gaming:it reach 45-46
@ omar, if you have the extra bucks to spend more on your rig, grab a 6850 1gb ram even for the 50$ because it's better about 10-15% i think . good luck and if you can , please reply to my message about overclocking HTCs

and regarding the hardisks , it's better to buy two 500 gb harddisk since they can work faster( 2 poles to one location ) unlike the 1TB hardisk.
Hey Omar...I recommend you do NOT go with a 5xxx series card. First off, the 6xxx series has better tesselation performance, newer features, less power usage, lower temperatures, lower price...If you want something more powerful than a 5830, go with a 6850...slightly less powerful (1-5%) than a 5850. By the way, what resolution are you running at?

And godfatherdany: Yeah it gets pretty hot. I have put its fan at 65% though, and created a fan profile for it in afterburner. I have an 850W power supply for it since it consumes ~230W max overclocked (definitely higher with FurMark). It was a good investment, but although new cards like the GTX 570 double on its performance, games are really progressing slowly (diminishing returns). I mean, the difference between Very High and Extreme in Crysis 2 is barely noticeable when moving. Only the shadows are improved and the lighting is VERY slightly better. I get 36-60 frames on Very High (36 on the most congested scenes - absolute minimum) and 25-40 on Extreme (low 30s average with annoying dips). Not a worthwhile trade-off, IMO!
Two Hard disks? I don't recommend that except if you plan a backup. If one of the drives fail, the other drive has half the data (useless). The chance that one drive fails is higher when you have two drives. For gaming, the hard disk is only significant for loading speeds and Flight Simulator X. Having a faster subsystem (i.e. CPU, RAM, QPI Link (Bus speed)) is more vital and more worth spending money on, IMO.

You should have a backup anyways. If you do, then think about the two hard drives if loading times are important to you. But remember that boot times increase a bit (as I remember).
@thegodfatherdany,I'am really sorry that I forgot to reply...yes I know a shop,it's called StarCell(located at Marilleas,near Class),he can root your device and install a custom ROM(last time I went there he took 20,000LL)but I recommend that you do it yourself,it's extremely easy,I can give you links on how to do it.
and yea, I can spend 50$ more on a video card (for the 6850),because I saw some videos on youtube and it's really impressive.
and for the HDD,since I'll spend more money on the video card,I think that I'll get just one 500Gb HDD,and get another one later,or put my old 250Gb HDD for back up.

@yasamoka,yea well,I guess that I will go with the 6*** series after all.
and I might keep my current PC for spare parts (the case,250Gb HDD,the DVD writer)and the rest I will sell them separately.so I think that I will put the 250Gb HDD for backup

EDIT:@yasamoka the resolution is 1440x900 is it low,high,or normal?
You want my advice? get an ASUS GTX 560Ti and forget about everything else.

After some crazy researches last week, I've decided that I'll be getting one myself - its probably one of the best cards available in the market now price and performance-wise, with few overclocking you can approach near GTX580 speeds, which is quite phenomenal for a 320 dollar or something imo. Plus, it has less power usage, and no overheat issues, all feedbacks have been extremely positive so far. AMD/ATI cards have the worst drivers support, period.

An i5 with a GTX 560Ti is the perfect combo.

Edit: still of course it depends on your budget and your opinion after all, so hey good luck with your purchase!
It's a really good card but it's way above my budget,my VGA budget is 250$ max
btw,what is the price of the HD 6850?
omar_killer wroteIt's a really good card but it's way above my budget,my VGA budget is 250$ max
btw,what is the price of the HD 6850?
as i remember, i saw it for 247$ at pcandparts.com but you should check definitely other shops because manufacturer prices can vary by 50$ sometimes ( maybe you could get the 6850 for 200$ and you can get it at 300$ ) but the chip is the same except for the cooling features and some others too.
great,I will defiantly go and see other shops,I have a feeling that ordering from PCandParts is gonna be complicated (it's my first time),did you try getting something from PCandParts?is it really cheaper?
Ok...that's a mediocre resolution at best...any card will be powerful enough for such a resolution. You want my advice? Future-proof...hey don't get the best card out there, few do, but a good card will make sure that you can enalbe anti-aliasing or ambient occlusion (basically, shadows for miniature objects like grass) which improves graphics quality, or you can play games if you decide to go higher (1600 x 900, 1680 x 1050, 1920 x 1080). It will last you longer if you stay at a lower resolution. Your budget is great, IMO. The sweet spot for performance / price.

EDIT: MegaCool, isn't ATI driver support really improving these last few updates? I mean, ATI update drivers every month maybe once or twice, Nvidia is starting to get kinda lazy. Maybe because Nvidia is stabler, but the issue of drivers is rapidly becoming a moot point. I mean, ATI have got some really awesome performance / price ratios! Fewer and fewer are complaining about performance with ATI, too. Am I correct? I mean, you're the guy with the ATI card :D
I want to get a new full HD screen,it's on the waiting list too,but the budget is my only problem here.
Well I recommend you expand your VGA budget to the max. You don't want to regret your decision later on. A GTX 560Ti outperforms the 6850, but not by much. Don't worry about Nvidia PhysX, with very few games supporting it and open-source physics receiving more support than Nvidia's proprietary solution.
right now at this point,it's 250$ max
but after a month,things might change.
omar_killer wroteI want to get a new full HD screen,it's on the waiting list too,but the budget is my only problem here.
Hey omar, don't get an FULL HD SCREEN because you will regret it once you want to play your games because playing games on 1920x 1200 is one hell of sucker for graphic cards and you won't enjoy the game with its maximum details.. What i advise you is to get a 32" LCD /LED of resolution 1360x 768 i think because it has lower resolution and wider screen and larger plus the prices aren't that different. You can get an LCD Samsung 32" for 380$ as much as i remember and i saw a LED one with this resolution for 540$ and Multimedia megastore near Geant CityMall.
oh really?
and yea,I'am really happy with my monitor (Asus VW192s),it's old but it's very good,google it,
I saw this:LG E2040S Wide 20" LED for 126$ on PC&Parts
godfatherdany: he is going to buy a Radeon HD 6850 or GTX 460 (or GTX 560 at most). The sweet spot is 1920 x 1080. I have such a monitor, and I have no problems with GTX 260. It's a matter of preference, however. If Omar is willing to select medium-high details later on (2-3 years??) with a full HD screen, then he should get one. If he wants the absolute best graphics, I suggest he upgrade more frequently (I don't do that). What I mean is, the monitor is the only part in the PC you spend the most time looking at, a higher resolution is where the PC shines. If he wants 720p, he should get a console. We're not talking about 2560 x 1600 here.

If his PC will be struggling with games (which I doubt!) later on, then he can select a lower resolution, provided the upscaling is done over the GPU (not within the monitor). MegaCool does that, and he has a 1080p monitor. MegaCool, how is the experience of running 720p over a 1080p monitor? Do you use GPU scaling, or monitor scaling?
yasamoka, actually my 3 year old GPU struggles with current games at 1080p resolutions, but of course, gotta admit, I hooked up my brother's gaming Laptop which has a mid-range 5xxx ATI card to the monitor, and we tried some of the recent games such as Bad Company 2 and Dead Space 2 @1080p, and gotta admit - mind was blown. It looks just too good, especially at decent frame rates. 720p is great for performance, but it looks blurry compared to 1080p visuals, of course, on a 1080p monitor.

Regarding ATI drivers, I haven't bothered updating mine in a while - not sure about the recent updates, but I remember how I struggled in running a lot of applications because of the poor drivers.