I'd say either the EVGA GeForce 9800 GX2 KO or the XFX GeForce 9800 GX2 1GB. The XFX card is probably the fastest of the bunch with it's overclocked timings of 700MHz core and 2100MHz memory. But it's also $30 more.
Well see it depends. I am very very impatient, (also an upcoming LAN party) and I would love to have a speed demon inside my PC. So if i don't have the card bought, and the other one sold on ebay by then, i will get the GTX 280.