PCMICROSTORE Brand (2nd Generation) Microsoft Zune 80GB, Zune 4GB and Zune 8GB Premium Silicone Skin Case with 14" Adjustable Sports Armband - 9 Color Choices
I needed a good case for my 80G Zune so I bought the black silicone.  It slides on very easily and fits like a glove.  It looks good and protects my Zune well.  I dropped it once from about waist level, no problem.  The only improvement I would suggest is a bigger opening for the headphone jack.  The straight narrow jack on my Vibe Earbuds[[ASIN:B000V5L5MG V-Moda Vibe Earbuds (Gunmetal Black)]] work well, but anything with an L shaped jack or a fat jack will find that they have to keep pushing it in.  I fix