I would disagree as well about the user friendliness of the iDrive. My previous BMW was a 2006 E60 and I had the thing licked by the time I drove the car home (170 mile drive). IMHO I think Acura (Honda) has the best interface for GPS, etc and the Germans have a little ways to go but not in the least is the system a disappointment as most of the reviews always seem to mention (Used to own 2001 CL Type S). I really think the problem is that their cars (BMW) or so close to perfection they have to pick on something, or most of them are already ripe and prime with age and they're still getting a grasp on the computer thing. Most kids can sit in an advanced aircraft cockpit and figure basic functions out in no time these days...
....Oh yeah congrats on your new purchase. I had been on the fence about getting a X6 or the M3. I wish I could afford both!