I liked everything about the z3 save the horribly cheap materials on the interior. The M interior on that car was better but if I had one (I may buy one again someday), I would pull most of the interior for a custom job.
The M version of that car ran very nicely thank you and was pretty easy to mod up the power, handling.
Used ones (regular z3s that is) are now quite cheap and it really is a fun car.
Nice compare and contrast to the Box.