Safelite is the lowest, cheapest nationwide vendor. I would never use them. They hack out the old glass, they do NOT use BMW materials or methods, and just glue the new one in place.

Find an indy glass installer- see what they can do. Dont pay a dealer 1500, they will just call the local indy and have them do it anyway using a BMW OE glass.

Make sure they get the proper glass for your options- plus a good indy can 'manage' your insurance as well. ("Oh, yours has the special XYZ glass and there is no aftermarket glass for that- so insurance will cover OE")