The Porsche Cayman is a two-seat sports coupe. Slotting in as an alternative to the Boxster, with which it's closely related, the Cayman is a lower-priced entry-level alternative to the legendary 911 family and a rival to the Chevrolet Corvette, Nissan 370Z, Lotus Elise, and Audi TTS. Although the Boxster has been sold since the 1997 model year...