It's the first time I am building my own PC and I could use some help, this will be my rig:

CPU: Intel Core i5-4670K
CPU cooler: Corsair H80i
Motherboard: Gigabyte GA-Z87X-UD3H
GPU: EVGA GeForce GTX 770 4GB Dual w/ ACX Cooler
RAM: 8GB Corsair Vengeance DDR3 Memory
HDD: 1TB Western Digital Caviar Black
SSD: 256 Samsung 840 series
PSU: 750W Corsair TX750M
Case: Fractal Design Define R4

The main problem here is the fact that I don't know where to buy the parts from, if you could provide some known PC hardware stores in Lebanon it would be awesome ^_^
And feel free to propose ideas that could make my build better, Thanks =)
3570K - N/A here, 3570 is here but not overclockable
H80i - N/A here, you got the Tt Big Water which you should Avoid Getting
GPU - You can get a 680, or a 7970 instead, however PcandParts has preorders, Ask MEIT about the 7970, I heard they got a nice price.
Board - Call MEIT
RAM - You can get HyperX Blue/Red/Black from NewVision
HDD - Logicom
SSD - I don't think CTC has it, however you got Kingston HyperX SSD's
PSU - Like I said, no Corsair stuff, However you can get XFX from CompuWorld, XFX, Corsair are both manufactured by Seasonic
Case - Forget about it, Choose something else from PCandParts.com and try to avoid ThermalTake

BTW, you could order all these from abroad. and All the companies I mentioned are from this thread.

Also, you could afford a regular higher capacity drive for the same price, and have less noise, and not much performance loss.

EDIT: yasamoka just informed me that Corsair is being manufactured by FSP, which makes XFX a better option :)
On the other thread you said that XFX is N/A, I was really looking forward to overclocking tho that's why I went for a 4670K and liquid cooling
Too bad the 770 is not available though, if MEIT got a good price for 7970 I would buy both and go crossfire, what do you think about it?
Avoid All-in-one watercooling kits, no matter what anyone else says. Either H100 or simply go for air cooling. Even that is trailed closely by the Noctua NH-D14. AIO kits can leak, leaks mean destruction. Even if 1 / 1000 chance; it happened.

If you want further CPU overclocking the best you can do after high-end air cooling / AIO kits is true custom watercooling, pump + rad + blocks etc...

7970 CrossFire is now something I can recommend to almost everyone; after the frame-pacing drivers, you can easily run CrossFire as it is, with no tweaks (VSync + FPS caps) whatsoever.

However, if you're not in a hurry, AMD cards are just around the corner. Doesn't make much sense to go 7970 CrossFire now except if prices are excellent, aka $300 per card, which is in USA. That's why the 7990 is currently good bang-for-buck as it trounces the GTX780 while costing around the same; however, single GPU *is* more reliable if you have some games that don't scale well / support multi-GPU.

All in all, something not to be worried about, honestly.
Here in Lebanon you have the Thermaltake Frio Extreme (available at pcandparts). Although build quality is not THAT much compared to the better air coolers, it's still built well. It's huge, and trails the Noctua NH-D14 closely.

Try as hard as possible to find a K edition CPU and good cooler and overclock. This way you can reduce CPU bottleneck especially in cases where you crank crazy FPS, particularly if using a 120Hz monitor.
Cooler Master doesn't have any good CPU coolers?
EzikMezik wroteCooler Master doesn't have any good CPU coolers?
They have GREAT CPU coolers. However, non of them can be found here ;)
Ah well I guess I'll stick with Thermaltake, thanks alot for all the info ^_^
Macrotronics has the CM Seidon 120M although its not better than air cooling but will free space in your case .(ie ram sink)

http://www.macrotronics.net/product_info.php/cooler-master-cpu-liquid-cooling-seidon-120m-p-5090

Wait til October before buying any GPU because AMD is releasing their new Volcanic Island architecture and I'm pretty sure it will make a huge impact in the market.

Pcandparts.com has the Samsung 840 SSD you're looking for but not the 840 Pro if that's the one you meant.

Check their product as you might change your mind about CPU and Mobo. K version Haswell and still expensive in Lebanon and if you're main interest is gaming I would advise to go with the 4770 (even the 4670 if you find it) because you won't need much compute power (nor OC'ing).

Best of luck
Current generation chips are sometimes bottlenecking modern GPUs, especially in multi-GPU configurations. It would be better to go K edition for gaming rigs if you want the best possible performance, particularly in multiplayer and MMORPGs, for example.
I can't seem to find 4th gen Intel K processors anywhere, PCandParts has the 3.5 GHz - i7-3770K but afaik you don't need i7 for gaming and the CPU is N/A at the moment. Will keep looking, keep me notified if you find anything yourself, cheers.