I would replace the PSU. Go with a thermaltake PurePower 500w PSU. I have it in my first build. I bought it at Microcenter for $75, you could get it cheaper online. Mine is also strictly for gaming. You also might want to up the hard drive. Many games are space hungry. I bought x2 250GB SATAII's for $60 each online. You also might want to change the case. I believe I heard not so good things about that case. If you have money to burn go for a aluminum case, if not go to a computer store and check the cases out...look for one with ample space inside (full atx case) or mid atx case and one with no sharp edges inside and enough space for the mobo.