You’ve read our review, seen whether iTunes or Zune was right for you, seen other reviewer’s 
takes on it, and even learned everything you need to know about the Zune in our Q&A. Now it comes down to the final question: should you buy the iPod or the Zune? After 72 hours of deliberating, I’ll tell you what I would do.
Since I’ve got an iPod, I’m sticking with the iPod. I don’t want to have to buy all my music again, give up smart playlists, and basically learn to use both a new player and the corresponding software. Then there are all the accessories I don’t want to purchase again. Plus, since there’s no OS X support, Mac users have their choice made up for them. And I’m a Mac user when I can be.
Say you’re not using the iPod, or are ready to try something different. Now, you’ve got a lot more options… Zune vs. iPod: The Final Word On Who Should Get Your Money - Gizmodo