Congrats on the purchase.
Please do a write up on this once it's installed. I've been reading the thread over at the E90 forum regarding this intake and it supposedly draws cold air not just from the front of the car, but also from the base of the windshield area!
http://www.e90post.com/forums/showthread.php?t=184580
I would have the dealer install as well. It's probably a bit more complex than a typical aftermarket intake.