I beg to differs. BMW is a mass market car so they need to produce cars that attract mass mkt. If you really want a UDM, u need to buy something from the M division, thats where the real UDM lies.
The new Z4 to me is a great compromises, not too hardcore as compare to Boxster S but much better than a SLK. I will not buy the previous model Z4 as it is too close to the Boxster and I will rather get a Boxster than the previous model Z4.
my 2 cents.