If you are going with a Dell - look at the 1730, fwiiw.
DO NOT get the creative software.
Which OS? Kaftan is right more RAM the better. I would put in no less than 2GB (if Vista 4GB). RPM HDD - again Kaftan is right - the 7200 is what you want.
I currently have a 1710 - brilliant investment!
Hope this helps.