I have a ruby black X5 with 239's on it, and just last week took delivery of a carbon black X5M and went with the 215's in ferric grey I considered keeping my 239's for the X6M but decided they were a more elegant wheel than sporty and to me, wouldn't suit the M as well.

pictures of both vehicles in this thread: http://www.xoutpost.com/bmw-sav-foru...6-m-order.html