"Do I need anything else?"
Make sure you get game controller(s) (i.e. gamepad, joystick, etc.) for this system, because there's nothing more frustrating than playing QuakeIII with a keyboard. And speaking of games played with a keyboard, if ya like real-time-strategy games, buy Age of Mythology (not available til late october 2002 but can be pre-ordered). You won't be sorry!
"Who drunk my apple juice?!"