Couple things. XP is truly not much different from 2000...only visually glorified and more full of more things like CD burning wizard, unzipping wizard, and a whole lot of what I call "Bloatware". Someone on the forums said something like one time (don't remember who): "Take off the look, and Windows XP is almost the same as 2000". Just basically avoid ME and all outdated WIndows OSes. As for the versions, it depends on what you want. Pro isn't worth the extra money unless you want the features it has, such as more network/workstation management type tools. It's got more things like FTP tools. Home is fine. And Office XP isn't a windows XP edition, it's a Productivity suite (with Word, Excel, and all that). Hope this helps.