I tried DirectX 10 (I heard 11 exists too), but enhnaced OpenGL looks way more "oldschool".

Which one do you use?

havent really started playing the game yet as im still setting mine up.. but between 10 and 11... for me 11 is the way to go.. i tried 10 and got horrible stutters and performance problems..looking into it it seems to be related to a driver issue..but im not about to roll back a driver to something really outdated. so thats a no go for me.