I drive an X5 5.0 when I don't feel like driving my M, and that thing is heaven. Lots of space, very solid feeling, and really not TOO big for parking spaces and sorts.
I am biased though and have never driven the RR Sport.
2011 e92 ///M3
- OSS ◘ Vorsteiner ◘ ESS ◘ Eisenmann Race ◘ Challenge ◘ RD Sport ◘ HRE P43SC