Apart from selling components with enough acoustical energy to convert brain matter into a psychobiological smoothie, there's nothing car-audio companies love more than building modded-out custom show cars. Alpine Electronics' newest is a super-custom BMW X5 it created as a demo vehicle for its highest-end audio/video system, F#1 Status. It's got some great custom work, including a center-console control system and automatic full-length doors (oh, and an awesome stereo). Supplementary hallucinogens are optional.
Alpine s BMW X5 [TunerTricks]
Toyota Displays DJ Booth Utility Van [internal]