Zune's are fantastic little players! I used to have a Zune HD 32gb, and absolutely loved it. I switched to a cowon J3 mainly for its ability to play FLAC, and it seems to drive bass much better (due to BBE and a different DAC I guess, given, I was listening to it with SE535's which are a little bass shy to begin with)
The one thing I REALLY miss about my Zune, is just how fast, and streamlined the experience was. Syncing was the easiest thing ever, compared with the complex hoops I have to jump through with mediamonkey and my J3.
I ran a Fiio E11 with my Zune HD for a bit, which helped alot with the bass on it. If anyone gets a chance to grab one for that cheap, even if you already have a player, I 100% would. It would be a great backup, or something for running etc.