I have a Q6600 @ 2.8
Same RAM
NV GTX 460
I run most things on low @ 1920x1200, still looks good, but if you up the settings too much the FPS starts going as low as 20 in some places. So a 460 is the minimum required I would say.
i was kind'a hoping to wait it out until Christmas when the newer ATi cards come out and drop the 2nd hand prices of the 560ti's etc...
B@