A good friend of mine had a new M3 ragtop for about 6 months. He enjoyed it at first, loved the power and 6 speed, but traded it for a year old 996. He didn't need the back seat as much as he thought and the M3 didn't have the sports car "soul" that he hoped it would.
Fowr the record, a 330ci would do the same job and leave extra $ for P-car projects!