I say go 2k until XP comes out. i did a dual boot system for a while and I ended up just sitting in 2000 all of the time instead of booting into ME. If you get 98 make sure you read about tweaking it! I can get my 9x/ME to run very well if I tweak it(Cacheman and Memturbo are musts) along with programs like TweakME and some others out there. Check www.tweak3d.net for FAQs on computer stuff. PM if you have questions.