That's a nice CPU/motherboard combo. +1 to going with the 4870 to leave your crossfire options open. I know you said you don't want to do crossfire, but you never know. You also might want to step up to a 750W PSU to have plenty of headroom for possible crossfire in the future.
Thanks a bunch outlander and shortstuff, I guess I'll be switching to a 4870 1gb and and 750W Psu in case I ever choose to crossfire. Should I also switch my case? Or will it have enough room if I ever do choose to crossfire. Also, what would be the best brand for the 4870? Again, thanks a bunch
As shortstuff_mt said, I still would like to be open for any possible upgrades in the future. Also if I also choose to get a COOLER MASTER RC-690, crossfiring two 4770's would push me out of my price range.