XP Pro vs. Win2000
I have been a A+ Tech for some years now, I have used both, and I have troubleshooted both for clients in the past. I use WinXP Pro SP2. It has alot more features than Win2000. Win2000 is and was used almost strictly for WorkGroups ( or at least that is what MS intentions for it.) and XP Pro's intentions from MS was for Small Businesses. Side by Side I would say both have their ups and downs, most will be the users preferences of the OS. Go ahead and upgrade, it is worth it, and XP is a pretty good OS, aside of all the problems you hear people having with it. "As far as the comment in someone's previous post that Vista will replace XP as the leader", we will have to wait and see. I am not one to jump on a OS as soon as it becomes available, I grab and use it when I AM READY TOO.
Good Luck Either Way, Devildog