At A Stalemate

Hello everyone,

I'm interested in buying a new MP3 player for use under a DJing style environment, and my most important priority is playlists. I have narrowed it down to either the Created Zune 16GB or the Zen 80GB, for playing several playlists for playing a mix of unprotected AACs, MP3s, and WMAs.

How many GB is not really a concern, I just want the player with the best playlist options combined with great sound. For anyone that has used both, owns both, or knows information about both, could you please help me out?

Thanks for your time,

Alex