I guess the question would be do you want to watch video? I have iPod video which I won about a year ago from a local TV station - and in the year, other then just playing around to impress friends that I had it - only 1 time have I actually used it. (when driving 4 hours down to an amusment park, I loaded a few movies on it for my wife to watch) - other then that, it sits on my shelf collecting dust.
Now as for a music player - the question would be iPod (Nano) vs. other mp3 players.
Let me tell you - I HATE loading music on an iPod. Why? Because lets say I have 30 songs I want on my mp3 player. For the iPod, I first have to load there software. I then in the software, have to make a library and import the songs that I want in there - then I have to sync the library with the iPod. And on top of that, the iPod can only be "synced" with the main computer. That is if I help load some songs on a friends iPod, if they take it home to their computer, they will be unable to sync it without removing all the songs I first put on there. I'm sure there are some hacks and such to get around this, and I'm sure it is probable pretty friendly to first-time users who don't know much - but it's a pain for me.
Oh, and the process of adding the 30 songs to just about any other mp3 player. Open my computer, and click & drag the songs over to the mp3 player. All done. Nothing to load - nothing to sync - etc.....
I have 2 SanDisk MP3 players. A regular 1gig one that I gave to my wife, and another 1 gig one that also takes extra memory cards to hold more music. (So I can put certain types of songs on different memory cards to play them.)