Well, I really don't pay much attention to the actual performance of the various parts since they don't exactly reflect current real-world games. I just like to watch them for the eye candy experience. My 6800GT works just great in current games, and by the time games with the detail of 3DMark tests arrive, I'll have long since bought a new card (and system).
Yeah, I'm currently eyeing the 7800GS, praying it'll come to the AGP platform!
I'd go PCI-e (SLi, A64 X2, etc), but I'm gonna' build a new rig next year, so I might as well just let the cash stack up, occasionally buying a part or two to tide me over.