Heres the thing, for the CPU, it was suppossed to be core i5 Sandy Bridge 2500k but newegg just ran out, and other sites are too expensive, I was wondering if I used a core i7 Sandy Bridge 2600k, will my 600w power supply still be alright for my build, even if I overcloaked a little bit more.(I am not planning to go SLI anytime soon, just building enough to run BF3 on ULTRA)
I would get the corsair tx 650w or 750w psu. They also come in modular versions but those are slightly more expensive. Cooler master psu's aren't that good, companies are good are: corsair, antec, seasonic, xfx.
Yeah I would go with Muffin's suggestion the 580GTX is like 220+ TDP all by itself, you can verify that here at time with the GPU charts that they have. I would be in the 700 to 800 class to be safe you have some scalability.