2000 is a very good operating system. Very reliable, and very slim. It is not as bulky as XP. 2000 uses very little resources compared to XP. 2000 is the best operating system that MS made.
But I would be using 2k right now but I have programs that require XP.
INTEL i7 930
3x2gb Corsair Dominators
EVGA GTX 480