Agree with above, both will perform very similar in gaming. I've got an E8400 myself, great CPU, overclocks well and offers excellent performance. The AMD will offer a better upgrade path though, socket 775 is out dated now by the newer intel socket, whereas the 720 is the newer AM3, meaning any newer AMD CPU's will work with the motherboard and DDR3 ram. So if it was me, I'd go for the AMD setup, it's cheaper aswell.