Don't forget to take a look for a GTX460. If that card is around the same price you probably want it. Needs two PCIe 6 pin plugs however so make sure you have the power.
This's my MB
And have requested the supplier to check the exact prices and he said he'll confirm by tomorow. And I've fixed 6770/6790 cause I guess higher one's will just get bottlenecked. But now am abit confused about choosing the 6790 over 6770, since people say its not worth the cash. and is 256Mbit a worthy upgrade from 6770's 128Mbit???