I'm running a 20" Viewsonic widescreen monitor. So the screen itself is set to 1680x1050, that's what the monitor advised for best resolution.. I think I set the game to something close to that... Not sure, I haven't messed with it in over a week.
From what I gather:
4870 (CF or x2)
or SLI 9600's?? (I've got the OC'd edition 675m, EVGA, GeForce)
I'm building a new rig soon for dual cards.. I just want good gaming, nothing TOP NOTCH, but nothing mediocre.