It seems there are a lot of sleeves (without handles) out there, and most of the threads here focus on those. Also, most of them seem to be for the 11.6" model. I'm interested in learning more about CASES (with handles and a removable shoulder strap) designed for the 13" Air. Most of the nice cases I've found researching the Internet are for the 13" MacBook Pro and might work for the Air but probably wouldn't provide the nice snug fit that I want. Does anyone know about a good case for the 13" Air?