My wife & I want a fun car, a two seater, when the lease is up on our '03 TL-S next year. Must haves: '06 Model Year Automatic Transmission (Honda S2000 is out) Rear or AWD Navigation Leather HID's Under $55K A convertible would be nice but not a must have. We're currently looking at: Corvette BMW Z4 Mercedes SLK Audi TT Porsche Boxter Pros & Cons & other suggests PLEASE ??????