I know the cayman is a very nice sport's car to drive given the mid engine configuration for better balance. Some say even better than the handling of the 911.
But something about the looks of the 911 that the cayman just doesn't seem to fit well with the word beautiful car other than its a PORSCHE. I hate the rear end maybe its the tail lights and having a flat rear end. The 997 GT3 is still the car to die for!
The Z is far more sexy and close to be looking like a 911 looking from the rear fenders only.
