+1 on the 5770 too. Though you can sell 2GBs of RAM and get a better monitor, as I doubt rndering uses over 4G.
That Gigbabyte is good enough to OC, try going for 3.2Ghz, if should be just fine.
there is no point of selling 800 ram. so ill keep 6gb. i like it cuz i can minimize games easily. hey "20 if fine.