gipoy wroteCPU: 3.4 GHz - i7-2600K 8M/LGA1155 (2500k not available, only 2500)
The 2500k has only a few dollars difference at
ROG Store so it's not worth the downgrade. Even though the 2500k has better gaming performance it's just not worth downgrading for just a few dollars for a maximum of 4 FPS.
gipoy wroteAsus ENGTX570/2DI/1280MD5 GeForce GTX 570 1.28GB DDR5 (Supports SLI)
I really don't recommend you to get this card because Asus had a few overheating problems on their first 5xx series card which don't use the Direct CU II fan, so I'd encourage you to get a Direct CU II cooler version of the card.
I also think you should directly go with the GTX580 because not all games support SLI and even if they do they won't perform as well as one GTX 580 card.By going with one GTX580 your system will be very future proof (up to 6-7 years even)
If you get a GTX570 it will loose performance to newer games too fast and by going with SLI it still wouldn't be worth the money.
2x GTX 570 = 400*2 = 800$
1x GTX 580 (which is a lot faster then a GTX 570) = 599$ (Direct CUII version)
The case seems decent and yes
it can support future SLI (Even though I don't recommend it)
gipoy wrotePSU: Thermaltake W0356RE Litepower 700W
Amp*Volt = Real wattage
The LightPower series are low in amperage which implies that it won't last the whole 700W without failing. Furthermore a 700W PSU is not enough for a decent SLI.
When looking for a PSU always check the specs (12V Rail(s)) if it has 64A rail it means 64*12 = 768Watts.
I recommend you to get more then 850W since you will be overclocking and possibly even have SLI setup in the future.
I recommend you to get the
XFX P1-850S-NLB9 850W PSU
As you can see this PSU has 70A on the 12V rail which mean (70*12) it can handle a maximum of 840W of pure power, meaning you can overclock the heck out of your system without worrying about power usage.
Feel free to inbox me if you got any questions.