Pretty much what the title says. I think I've narrowed it down to the HD 7950 so now I want the best one to OC and for Xfire and under $300 (or very close if there is a very good reason to spend a little more). I'll only be buying one at this time and next Christmas I'll pick up a second, unless the next gen of cards is just amazing or drops the price of the current gen by a lot.
Thanks for the help everyone!
Edit: I forgot to say, it's strictly for playing games, WoW, Civ5, Borderland 2, new SimCity, and some FPS (not sure yet) on a single 120 mhz refresh rate monitor @ 1920 x 1080p
Exactly what Andrew said, the 660ti is not a good card for the amount you pay. Look around for a nicely priced 7950 non-reference card. ASUS (DirectCU II), MSI (Twin-Frozr), Gigabyte and HIS (IceQ) are great examples of good after-market cards.