At the top end you have the 7850 starting at $170-$180, a very good deal. At the lower end you have the 7770 with most good models running around $130, with the best at $140
Sapphire 7770 OC - $140http://www.newegg.com/Product/Product.aspx?Item=N82E16814102968
Sapphire 7850 - $180http://www.newegg.com/Product/Product.aspx?Item=N82E16814202004
Right now I'd say the 7850 is the better deal for your dollar. If you are a huge nvidia fanboy the 650 ti isn't a terrible option at $150, but the amd options are more bang for your buck.