I'm looking to upgrade my GPU tonight from an HD 7770 1gb to a GTX 660 Boost Superclocked for $204 or a GTX 760 Superclocked for $265. My budget is $275 and I was wondering if the upgrade is much of one at all, if I should consider any other cards, and if the $60 price difference is worth it. I have an i3 2120, and 8gb of RAM. Thanks!