I have a gigabye ep45-u3dp with an e8400 @3.5ghz 4gb of ddr2 radeon 4850, I am getting to the point were I want more performance in gaming and what not. My question is should I get another 4850 for 100 bucks and crossfire them or would I be better off spending the extra cash and getting a newer card? if so what card would you recommend?