Which ever PC I used, Windows 2000 Pro was SLOW. Advanced server was worse. I kept on losing connection. Anyways, i'm about to make the move to Longhorn Server 5728.
did you make sure to download the drivers for your motherboard? windows 2000 does not come with them. For me, when I first install 2000, it is VERY slow... until I install drivers, it's up to speed then.