Thank you man. I too heard that engine from 5.0i (N63TU) has many problems and not a good reputation in terms of reliability. Even the dealer says, that if he would buy now car for his son, he will buy m50d.
As for X5M, at my size (1,94 m and 105 kg), it has very uncomfortable seats (4 MA Multi functional). And replace them with comfort seats is impossible (some genius at the BMW so decided
). Here I wrote in more detail
http://f15.bimmerpost.com/forums/sho....php?t=1142968