Ace - find a weekend and drive up to Jacksonville. My clear bra installer can run you a great deal on Xpel products. The entire front end of my car, as well as mirrors, fender flares, side skirts, etc, are covered with Xpel Ultimate, which is a self-healing film. Very difficult to tell it's there as well.
If you just want the headlights done I'm sure he can give you a very competitive price including installation.
Congrats on your purchase!
'08 e90 M3