Yea that was my curiosity. In all honesty im not unreasonable, it doesn't have to be entirely maxed out. Currently my single 6970 can not do DX11 in that resolution.
WHAT? You already have a 6970? Then you don't need to switch to 580s, just get a second one... oh wait, you're tired of Eyefinity. Well, are you sure nVidia doesn't have same issues?
Also, what's the rest of your current specs? Maybe you don't even need