I want to build a gaming computer for not too much money. I don't know too much about building computers. I play COD4 all half life source games and thay run all right on my current setup. I want to be able to run them all on high settings. Also I need a processor to be able to be overclocked to run rainbow six vegas(I belive it needs 3ghz?) I have a monitor keyboard and mouse and stuff already so all I need is the case and the componets inside. Help would be greatly appreciated. I would like to keep it cheap as posible and upgrade in the future as needed. I guess $500-800 at most for now. If you have to go beyond that a little to get some awesome components you highly recomend let me know also.