EVGA 680i. It's like $220, but it's also probably the best out there right now.
Also check into the Asus Stryker 680i (I think that's what it's called...something like that)
IMO the price difference isnt worth it to buy the E6700 instead of the E6600.EVGA 680i Mobo
Intel E6700
BFG GeForce 8800GTX
2x 1Gb DDR2 800
350 WD harddrive