Before you choose the 6850 I would look at the new radeons card like this at the same rpice or cheaper. http://www.newegg.com/Product/Product.aspx?Item=N82E16814102993
7770<6850. If OP wants better performance he'll have to spend like $250 on a 7850. 6850 and 6870 are the best bang-for-buck that AMD has to offer right now.