Well...
After having learned a ton of knowledge and experience from all the members of this board, my time has come to put the order in!
Performance Center Delivery is scheduled for the end of October. Now, the 5 painful weeks of waiting begin.
Exciting indeed. Hard to believe they will build your car to your exact specification and you get to pick it up at the factory nonetheless.
Thanks to everyone for their wisdom and patience! Best X5M forum there is.