Right now, I've got a 275 GTX. PSU is an 850 Watt Corsair. Resolution would be 1920x1080. This build isn't completely from scratch, I'm just upgrading the core components. here's what I'm replacing:
ASUS P5E3W Premium-->ASUS P8P67 Deluxe
6 Gigs of Patriot 1333--> 8 Gigs G.SKILL 1600
275 GTX--> ????
I vote a a hd6950 CF unlocked into two hd6970s.