I threw in another half gig of ram on mine to go up to a full gig, and no problems with the machine, and mine is basically 2 years old now !
I was told today that Future Shop online have a complete P4 2.8 system, with monitor, mouse, keyboard, 80 gig hd and XP on it for $299 !!!
WOW, all you would need is the $60 dollar card on top of that and good to go.
As for my racing, well slipping back a bit, I just can't quite find a setup that lets me run as hard as I want to into the corners, but working on it !!