It's actually my first one. I got the 160 Gb classic a couple of days ago. I was looking at others alternatives too, like the Microsoft Zune but the only thing the Zune had going for it was the bigger screen and the FM radio.
So far i'm really digging it. The only downside I see is that it smudges easily but that's not much of an issue, especially since I just keep it in my case.