Get Panther--the rest of the family much prefers it on the G4 iMac, so I guess I'll be upgrading my iBook G3 shortly from 10.2.8. You could always partition your HD and run both 10.1 and 10.3 or better yet, get a supported FW drive while the cash is running

I think the best part of Panther is that you can have multiple users running. My kids can have their p2p software running even when the parents switch users to check mail, etc. (and we don't have to put up with their bizarre desktop schemes!) So for us just the fast user switching is the best part, and Panther does seem to run faster.

And isn't XP a Mac look-alike? , just like Windows was a Mac OS look-and-feel switch from DOS?