It's a cold, wet, typical spring day in the UK. It's Friday and you've decided you need to get away for a few days. Being a petrol head, great driving roads such as the route Napoleon and Stelvio pass naturally flood into your mind - now all you need is something to drive. Imagine we dangle the keys to these dream machines from Stuttgart in front of you. Which would you choose for your weekend away? Cayman, 911 or Boxster?