dash looks soooo much better w/ out Nav IMO as that's what I have and wanted. I could care less about the nav. there's no wasted space in a non-nav car as most cars only have one dash opening over the gauges so I don't really know what you're getting at. IMO you're post sounds a little eccentric lol, just buy the car already. Maybe I am too impulsive as I buy everyhting I want on the spot but I don't get all the posts about people going back and forth forever before even getting something esp an M3. If you want it you gott have it now.
rant over, and not directed towards you OP;
Good luck on your search!