My 80GB Zune worked very well, until the other day! It's about half the size of my phone, and much easier to carry on the motorcycle, or to the gym, etc. I HATE taking my phone to the gym. Not to mention, I can't make my phone carry my entire library of music without spending well over $100 on a 128gb SD card. I'm still contemplating buying another Zune.
I have ZERO interest in having to constantly add and remove files from a smaller storage device, like most people do with the little iPods, their phones, etc. I had 78gb on my Zune!