basicly what everyone else said except get a good CRT over an LCD
and get 4s steelpad, and a few packs of padsurfers. Would also like to recommend microsoft intellimouse explorer 3, dont get IME 4, it has a stepless scroll and it sucks. You might also want somekind of gaming glove
you dont want to burn skin when playing cs with a low sens.
and ofcourse, a sorround sound headset, and another high quality headset with a mic, and youre setup for just about anytype of hardcore gaming.