Windows 2k IS designed as the replacement for NT 4.0 systems. Although windows 2000 does have WinNT4 and Win9x features, it is NOT designed as a desktop solution. I've been testing it for over 4 months now, and I can personally recommend that if you are pretty comfortable with NT and 9x and you have a pretty powerfull computer, its worth the upgrade from either NT or 9x.

Philip