If you're not in a big hurry, we still think the basic Z3 1.9 provides a joyous sports car experience, enhanced by excellent quality and seductive good looks. The new 2.8 version definitely nudges that experience into the realm of fast-forward. And the M Roadster takes it to the edge of the Corvette performance class. With the addition of the third flavor, this is an exceptional sports car menu.Having said that, we must add that the Z3, Mercedes SLK and Porsche Boxster all provide different interpretations on the small two-seater theme, and each has its own set of virtues. We still think that if you're shopping in this realm you should drive them all. Maybe twice. Maybe three times.