Currently I'm looking at getting a new computer to upgrade my 4 year old HP Pavillion that is running Win98SE and going at 466 MHZ. Right now the computer I've seen that interests me the most is the Dell 4500S, however I've been out of the new computer game for awhile and do not know a lot about some of the advancments that have occured in the industry since I bought my current computer 4 years ago. Three main questions I have though, the 4500S has 6 USB ports all of them are USB 2.0 ports. Is USB 2.0 backwards compatible with original USB? Could I still be able to hook my scanner, wireless mouse, and portable MP3 player up to this new computer even though it supports USB 2.0? my other concern is the speed of the 4500S. I plan on using this new computer to get on the internet, download and play MP3s, as well as maybe burn a few CDs here and there; will 1.8 GHZ P4 be enough for this or should I move up to the 2.0 GHZ P4 chip? also on the subject of speed, what about RAM Dell recommends 256MB but I'm thinking to bring the cost down that 128MB should be good enough for my needs am I right in assuming this or should I go with the 256 MB to be safe? last but not least is Win XP Home Edition hard to learn coming from Win98? is XP better than Win98 in terms of stability? thanks.