Rob B. 
2002 BMW Z3 Convertible 2.5i 2dr Roadster (2.5L 6cyl 5M)
Still one of the best roadsters
 Love this car. It corners so flatly that it almost begs you to take it around corners even faster. The straight-six is ultra smooth, and strikes a good balance between low-end power and a willingness to rev. 
Reliability has been excellent, and build quality is pretty good (BMW's are good, but Japanese cars still have the best fit and finish). I rated gas mileage as average, but I think that's probably because I never let off the gas pedal : )