The only thing that I would suggest is changing the memory from the OCZ to the GeIL Black Dragon kit. They will be better overclockers than the OCZs. I know, the prices are close, but still, it is a better kit.
ocz is guaranteed for 533, best i've seen from the dragon is 470 ish, so for the £9 i don't see the point.
Go for the 4870 instead of the 4850![]()