I am in the market looking for a back case for the Mini, and was curious if anyone has tried any of the following three cases? Speck Smartshell Macally Protective Case Switcheasy Coverbuddy I like the idea of the Speck case having the metal along the backside of hte case, which is the main attraction for me. The Macally is the case I can find no reviews on; but love how the sound is ported to the front, as well as the smart cover is secured by the case. Switcheasy has always been a great maker of cases, but seem rather generic in regards to no magnetic strip or sound modification. My default is switcheasy, but if anyone has or has tried the Speck or Macally I would appreciate your input. Thanks.