As I understand it Z1 was designed as a roadster, Z3 a roadster, Z4 a roadster and that's how they should stay. I love the look of the coupe to a point but if i wanted a fast coupe there're other cars i'd choose over the Z4. (having said that i don't want a coupe so that comment is pretty pointless)
For me it can only ever be convertible and for the record if the E89 had a ragtop i'd be even more happy. I think BMW spoilt the 3 series when they tinned the convertible. I prefer the shape of the E89 over the previous Z4, sorry guys but we all have our own preference, and i don't think a ragtop would work on the e89 shape.
Life should be lived in the fresh air and under canvas.
Those of you who can't take or don't take the lid off miss so much of a beautiful world.
Roofs are great on houses and that's where they should stay !