| The Bottom Line | The 2010 Lexus IS 350 C leans more to luxury than sport--remaining a very satisfying driver when not pushed too hard--and includes some very useful cabin tech features. | The 2010 Infiniti G37 Convertible offers an excellent cabin tech package and fun sporting capabilities, but lacks some refinement for everyday driving. | A fun, luxury roadster, the 2012 Mercedes-Benz SLK350 carries an excellent cabin tech suite and delivers aggressive performance, but those looking for a cruiser might find the SLK350 too much of a beast. | With its high-tech cabin, the 2010 Audi A5 Cabriolet is a comfortable cruiser, but it is not powerful enough to drive like a sports car. | The 2012 Aston Martin V8 Vantage Roadster serves as a fine showpiece, but a balky transmission and poor cabin electronics hurt its everyday drivability. |