Since I started this thread, I can't agree more with the moderator. I just was looking for some opinions as to why the Z4 seemed to be lacking in popularity as I've found it to be a really nice sports car. It's done well at AX events even on street tires. It's not slow and I think the hp may be a little underrated given its performance. Early on, BMW marketed it though the BMW films such as "Hostage" but beyond that, I've found only one commerical advertisement and i saw that at the dealer in the BMW electronic "inforomation center" which was really neat. You can "build" any BMW, see the films, advertisements for all models, etc., and any enthusiast would find it of some interest., I think.
One thing that has yet to be addressed from my original message is the IPod issue. I ordered it for my car and after to attempts by the dealer to make it work, discovered that it is "not compatible" with the premium audio system. I'm guessing it's because the Carver amp is in the trunk? The headset has the connector port and it charges my IPod (and the IPod plays of course), but there is no sound. How could BMW be so ignorant when it comes to this. The permium audio system is more limited that the base crapo radio???? I have a Griffin fm modulator but it is a poor substitute for a direct connection.
On the performance side of the discussion, there is no question that the M# is faster. It also goes for $10k more comparably equipped, particularly with the deals you can get on the Z4. Anyway, I still fell I made a good choice. This comes from a certifed car idiot who has owned three BMWs, seven Mercedes, two Miatas, and RX-8, works at an SCCA race track for club events and Ax every month. And it get noticed by lots of ladies of all ages, too, all with favorable comments. [driving2]