The build I suggested would be a MUCH better suited build for playing at that resolution.
what resolution is that?
Anyways, his goal is under 750, which could be achieved with your build by going back to the 320GB WD while staying with the light-on burner and counting the $20 rebate. I see no reason to spend more money to get a combo unless he actually wants the 1TB drive. Also, who knows whether he cares enough to buy a 560 Ti over a 6850 for $80 less (almost enough to buy Windows 7 Home Premium OEM). It might even be worth stepping up to a 6870 and still save $50 over the 560 Ti.