I've read a bit about the "BMW Individual High End Audio System"
As yet a further option the new BMW M3 may also be fitted with the BMW Individual High-End audio system specially developed by BMW M GmbH and offering the occupants a truly outstanding experience in sound tailored specifically to the acoustics of the car.
I'm wondering if Steved can comment or if anyone would like to make uninformed speculation about the quality? I spent a weekend with my e46 replacing all the speakers, adding an amplifier, a PhatBox and a 12" sub. I'd like to not have to do that again, although I expect I'll still have to add bass.
Yes, I realize that for some readers they'd prefer to delete all heavy audio equipment, please move on.