The RX-8 give you the most bang for the buck when compared to the other cars in its class. None of the others has a back seat, which really comes in handy for extra people or extra gear. The performance is outstanding, it handles better than the BMW4, Nissan 350, or Audi. The six speed manual shifter is perfect, and the Bose stereo is awesome.
The 6 speed manual is outstanding, and also comes with a bonus of about 40 horsepower. The automatic has less horsepower. The Bose stereo is awesome, but turn the radio off once in a while so you can hear the scream of the rotary engine.
Better gas mileage would be nice, but that's really the only knock on this car. It's like complaining about Cindy Crawford's mole.