I only play single player and I've had exactly one crash in 192 hours of game play since Shogun 2 was released. I'm retired, so I do play all day sometimes. My current rig has an Intel I7 processor and GT285 Nvidia graphics card--although I thinking it may be time to step up a notch with one of the newer cards out now.

Aside for the DX10/11 issue---Shogun2, at release, is miles ahead of Empire in polish.

Cheers