My mobo is a EVGA 780i, but PSU isn't good enough for tri-SLI. But anyway, there is data to back up the dual 9800 GTX (and especially my SSC's OC'd to 810 core, 2044 shader, and 2430 memory). http://www.hothardware.com/Articles/NVIDIA_GeForce_GTX_280_and_GTX_260_Unleashed/?page=11
The SLI'd GTXs handily beat the current most heavily OC'd GTX 280's. I think the choice is becoming pretty clear. Anyone think people in my situation should wait for the ATI cards though, if nothing else to drive prices down?