If you end up buying that Phenom, and before I buy my build (which could be as late as Spring), tell me how you like it :)
Edit: I talked to some friends, and they said to go with a Phenom as well...so new link: http://pcpartpicker.com/p/AmnT
I have the 7770, while I admit it's good, I feel I'd be a little happier with the 7850. If you're willing to dish out a bit more, look into that.
Also, I see no reason to spend $50 on 8 gigs of RAM when you can shave that in half, and see extremely minor performance difference.