I wouldn't even consider buying a car without Sirius, locking gas cap, and good gas mileage. This car offers the above with the best audio quality of any car I've experienced. The 6 speed manual with use of 87 octane gets me 21mpg between by highway and city driving. I would probably get better mileage with the suggested 93 octane. That is decent considering the car is built solid and the engine is 2.5L turbo. My only 2 complaints is the driver's left side elbow rest is uncomfortable during long rides. Second I continue to experience small issues with the convertible top software. The car sometimes thinks the roof is open when it isn't so you have to open and close it to reset the sensors.
Hopefully the feature I never have to use which is the safety aspect. Audi makes a good convertible as well, the A4 but the A4 has a poor safety rating unless they recently improved it. Also the wheels and color coded exterior functional door guard lines and built in mirror signalers look fantastic.
With the manual shorter shifts and role back control when starting on a steep incline. Get rid of the CD player and replace with an ipod cradle in the same location. Also move the optional GPS screen so it is combined with the radio/thermostat LCD display. The GPS should also be touch screen.