So we meet again...
If you're in doubt, check toms' articles on best gpu for money... Radeon is recommended over nvidia.
What for you need 700w psu? That's just too much, unless you plan to put second GPU later?
Yeah, well I wanted to be safe with a 600w, and all the 600w I was looking at were only 5-10$ cheaper than the 700w, and I may add more GPU in the future. Having too much power on it wont harm anything right?
Also thanks, I already decided I'm sticking with the radeon you suggested earlier. And I'm ordering the parts atm!