I think most standard video cards only support 2 displays, even if they have a third output, like S-Video. Everything else in your build looks like it could be anything, but you'll need to research on video cards. I know that you can get Workstation class multimonitor cards, but they don't always work well with games. For example, the FireMV I have in my PC, I can't even enable Aero in Windows 7. Also, with the popularity of touch-screen displays, I don't know if you need a special video card for those or what. So since you want something special concerning the video card, you should probably start with that and plan your build based on that. I'd expect you'll have more work figuring out the correct video card to get than the rest of the components.