I like both the s2k and the Z3.
My only problem with the Z3 is that I'm a Family Guy fan and when Peter Griffin is try to compensate for things he doesn't have (When he sees Chris starkers) he gets a sports car and to me it looks like the Z3. And because of that Family Guy ruined the Z3 drop top for me. I have always loved the coupe though.
Never realised the S2k had such a disappointing clock though. That'd irritate me
So all in all both cares i like quite a lot I've come to dislike in this post
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I feel you can't really compare an R32 to having a Z3 or a S2k. They're different kind of cars.
I say S2K as long as you never look at the clocks
Z3 for everything else other than the long front end that reminds me of something in a cartoon.