Almost all modern high end graphics cards are made knowing they will be abused for hours, the resolution for a projector would be comparable to a large screen t.v. if not the same if it high def. Proper screen or paint for the projector may be more of a deciding factor for a projector looking good. A bright bulb also, as far as an 8800 ultra, I would agree with the 4870 or 4870 x2 for the higher side of high end. I think it would look great, ensure you have proper power from your PSU, power recommendations can be found on manufacturers websites.