I've got a 40 gig iPod but, then again, I was only looking for something that plays mp3. I'm not interested in radio connectivity, having it available as a storage device, or any of the other things that other mp3 players can do.
Think about what you want your mp3 player to do, and how much you're willing to go through to have your mp3 player do it. Do you have a problem with installing third-party software to upload your music? Do you want FM capability? Line-in recording? All that other... stuff?
Consider these questions, look at the features of the aforementioned mp3 players, and decide accordingly. All a poll will do is tell you what other people are happy with; that doesn't give any kind of guarantee that you'll agree with what other people say.