DUDE !!!

You have a very nice setup no need for major surgery. If you have a crossfire board go 2x 4770 or 4870 if u have the cash. Processors come with 3 year warranty its a great processor no need for any change if you want to play games, just get a better card or cards

If its a non crossfire board Palit Sonic 260 , if you really feel like spending and want to use that full budget try getting a 4870x2 , i personally feel the 295 is overpriced if you can get the 4870x2 at around 350$ that would be a killer deal. And you would have one mad mad gaming rig