are any out yet? I know the msi nf4 neo2 is coming out shortly as some stores are taking backorders for them. I heard the X800XT PCIe ards don't clock that well - try and find a PE version perhaps. Also what about getting a pair of 6800Ultras in SLI? At the moment thats the only real point I see for PCIe.
I'm going to go nf3 now and see what ATI's new chipset is like - from what I've seen it looks very promising.