i myself am a fan of xp pro, i wouldn't upgrade from 2k for the longest time tho cuz i thought xp was too "cutesy" but once i figured out how to make it look like normal it wasn't so bad.
as for stability, i can't say much, i've crashed every OS i've ever had dozens of times, and xp is no exception. however, i push my computer a lot more now than i did when i was 3.1 or win95, so i don't know who's to blame.
ed