No not really.
My m5 has 9.5 rears and the "correct" size is 275. IMO 235 will look silly on a 9.5 wheel. My e90 has a 9.0 rear and 255 tyre. Even with a 255 tyre there's loads of arch space on the rear should you decide to go lower. A perfect medium would be a 265/30 this will still leave you space in the future.