You did.
Many more are spending much-much more for the Z4 (and new Z4 coupe).
But maybe I'm misunderstanding what your dealer keeps repairing on your car?
It sure does, doesn't it?
I for one love it... and am willing to live with the DFI noise. Coming from a motorcycle using a rattly common rail system (a brit bike, too... hmmm...), the car doesn't bug me (ever have anyone as if you BIKE was a diesel!?!

).
The two issues I've heard so far that really concern me are the failing cam chain tensioner (or the oil circut leading to it), and the gearbox problems some have experienced (some, TWICE!!! So sorry Poppy). Other than that, this car rocks.