Nice write up. I'm running on an 8800GTS 640MB but at 1920X1200. I have to play at medium to keep everything playable with this resolution. Still though it is gorgeous at these settings.

DX10 looks amazing though. It may be subtle to some but the differences to me are very apparent. The textures and shadows are much softer and lifelike. The vegetation is out of this world and blends together much better in DX10. Can't wait until DX10 matures. Hopefully some crafty individuals crack DX10 for XP.