i currently have a 7770HD 2gb gpu and want to replace it. i been doing alot of research but i'm on a budget so the 2 i have in mind are the 660Ti or the 7850HD. i will buy one at the beginning of the month and a 2nd for xfire next month. just want to know if anyone slse has any other good ideas on any. my budget is 300 bucks, cant go above that.