You will have a decent high setting on MOH, I've played that game on my old core2duo 2.4ghz, 6gb ram, GTS 250 1gb and I can barely play well just on medium at 1360 x 768 res to get a good fraps. I'm using Win 7 64bit. Seems these days a quad core is a must have on your rig.
Yeah i definitely needed a CPU upgrade and i think $100 is a good range for my needs.
ALSO if this helps im running 32bit VISTA!
24' Dell Monitor (DVI).