I like, they look really good, especially on your Z. i have been thinking of doing mine for some time after seeing the set on bmautosports website, the only thing that would concern me is the fact that the wheel could visually look smaller, as you are highliting the 'inner' rim, obviously being a smaller diameter than the outside, if you see what i mean.
When i was looking for my z I saw a set of black 108's on a grey z4 and it made the wheels look slightly smaller, from your pictures though it looks as if the colour is just right not to reduce the visual size, you must be well happy with them , and the fact they wont bubble!
When i was looking for my z I saw a set of black 108's on a grey z4 and it made the wheels look slightly smaller, from your pictures though it looks as if the colour is just right not to reduce the visual size, you must be well happy with them , and the fact they wont bubble!