I am looking into buying a new MP3 player, for the past several years I have used a Creative Zen Jukebox and have never had any problems with them. The battery on my current 20gb jukebox is beginning to lose its charge and not last for very long anymore.

My question is that if I buy a Zune or an Ipod can I use the existing music on my PC to transfer onto there or are you required to use the respective services and pay for music? The Jukebox is simple drag and drop any mp3 or Windows media file and I would like a player that keeps that same simplicity so I dont have to pay for music I already have.