I've taken out both a Z3M coupe and a Z4M for long weekends and they are both fantastic cars. The Z3 had a real old fashion feel, not that well built especially inside e.g compared with Audi but fun, very stiff chassis, amazing box and ratios and THE car to make other road users hate the way you're driving. It brought out the worst in me! It was just so responsive. I thought it was really thirsty until I realised it has a tiny tank. The Z4 is much more 'designer' & a better looking car, yes it is! I borrowed a white one, lovely car and not a big showey head turner. Quite comfy seats and superb driving position but very hard ride in both Z's. I had the Z4M when my partner was 7 months pregnant and she didnt really apreciate the finer points of the cars handling etc. I'd love to own either. Why aren't I saying how I'd love an Audi? I'd have an A4RS Avant over any BMW. The best, and a car you can easily put a child seat in the back.
Uncool I'm afraid. I'm in no doubt the car is superb but the BMW just has a stigma surrounding it. I know when I had my 3 series I felt I was loathed by more road users than in any other car I've owned/driven.