Any NV40-based card has awesome performance with next-generation rendering capabilities that are still not used to their full potential. I've never seen a 6800 taxed, except on 3DMark 2k5. But never on existing games. And we won't even talk about the 6800GT They're very nice cards either in an SLI our without. Why not just buy an SLI-capable board, and use a single PCIE 6800? Later if you need to double your rendering power, you could always slap another 6800 in there and SLI 'em.