Rippem 
2007 BMW Z4 M Convertible 2dr Convertible (3.2L 6cyl 6M)
Is it possible to have more fun?
 I can not speak highly enough about this car. Although it is still in the break-in period the performance is amazing. Handling is brilliant as well. This car loves to be driven hard. I really find the sport mode amusing, the level of throttle response and immediacy to respond to acceleration is similar to a Dinan chipped car. The car can also be driven easy especially below the 3500 RPM mark. The looks may not be to everyones taste but I like it.