I've had all three. I prefer leather. It seems to give my player (iPod) extra cushioning, but I don't know if it's any better than the other two.
Okay I have a co-worker who just got a Zen Vision M as a gift. We?ve worked together for a few years and I know that she?s pretty rough on her devices. The first thing I told her after saying ?that?s cool? and ?I?m jealous? was ?DON?T DROP IT!!? That being said the green eyed monster has got me and I?m considering adding one to my collection but the question is what is the best protection for the ZVM? Leather, hard case, or Silicone? I know that if it get dropped a certain way it won?t matter but what is the best protection?