I if you want to save a little $ you can downgrade to the i5 2500k as suggested above to save $100. You could go down to a 750w PSU.
You do not need a 2600k for gaming, it doesn't really give you anything more.
And according to power consumption data that I've come across for the graphics cards/CPU, you should be good with 750W as long as the amperage is good (Corsair, probably is fine).
Edited by donkrx - 8/8/11 at 2:36am