Bimmer sure handles well if the suspension is tight. I fixed up a 90 525i stick, head and suspension. What a sweet ride. Makes one feel young. My son drives a 91 735i. The big six is probably the most robust engine BMW ever made. Even though it has a slush box, the drive is also lots of fun. Bentley publish a fantastic manual for it, a very good thing for the Bimmer owner, cause you'll need it.
On the other hand, MBZ has a calming effect. The only time I shoot par, I drove wife's MBZ to the course. Felt extreamly calm that day.