Remember to get at least 8gb of ram and 4gb of vram if you want to use high settings and resolution because COH2 takes up a lot of memory.
I use a 2gb GTX760 and a quad i5 3.2 cpu, I play COH2 on medium graphics, highest textures, no anti aliasing, 1080p and the game runs reasonably smooth(except when there's smoke), although I get stuttering after a few games which is fixed by restarting.
