I get 60 to 120 fps depending on the place/action (average is 80). 1920x1080 dx9 maxed. (I also currently have only 2GB of ram until I rma)
Gd I love this game. Most fun I've had since battlefield 2 first released.
That setup will do ya just fine.
Fyi phenom ii and c2q are even. Phenom ii is slightly faster at stock (if you don't include intel extremes) and c2q is slightly faster when overclocked.
Phenom ii however will be the better route if possible due to price and upgrade-ability/techs (if you go am3) but that isn't an option here it seems.