Napster is now totally legit. You pay a £9.99 monthly subscription to download as many tracks as you want. However you can't transfer them to a portable player or burn them to CD unless you pay an additional 99p per track!
Kazza is an illegal peer to peer network where you're at risk of getting a lot of unwanted spyware and so is best avoided.
A better bet maybe iTunes (79p/track) which again is legal.
Hope this helps
This thread is now locked and can not be replied to.