I am starting to plan an audio system for my 2008 MS3. The plan is for a stealth system using the factory (non-Bose) head unit. So far, the plan is to use a LOC on the front speakers to feed a Zapco DC1000.4 amp. The amps internal processing capability, adjustable with software on a laptop, will avoid having to use a 3sixty or similar processor. It will give me 150 watts to each of the front doors and 500 watts to an Image Dynamics IDMax 12 sub. The plan is to install the sub in the spare tire well and position the amp in the foam-filled area between the well and the fold-down seatback. By having the cooling grillework for the amps (rackmount vent panel) and grille for the sub integrated into the floor panel and installing the sub in a depression in its enclosure, I hope to design something that will still give me a flat floor. Just leave the factory rear speakers powered off the head. Still have not figured out what to do up front and need to wait for a nice day to take everything apart, install some damping material, and see how much space there is. The choices would be 2-way with midbass and tweeter in the door, midbass in the door and tweeter in factory location or figuring out how to stuff an 8 midbass in the doors and put a mid and tweet in the kick panels. Hoping to hear about other installs to get some new ideas and figure out what sounds best in this car. All opinions welcome!