7770 or 550 ti?

Title says it all. I'm looking at HIS 7770 and the EVGA 550 ti. 

http://www.newegg.com/Product/Product.aspx?Item=N82E16814130625  ay?

http://www.newegg.com/Product/Product.aspx?Item=N82E16814161402  ayy?

Opinions. Im leaning on the 7770 just because of the better performance... Or should I wait and get a 6870?

Nevermind getting the 6870... Only $15 more with this sale can't go wrong with that.