PM 6spdcoupe. He should be able to hook you up on anything ARC Audio.I need to get with him soon for some Morel Elate 6's.
Your Max looks real nice dropped on those rims. How do you like the ride on the K-Sports? I have an 03 Altima and if I hadn't bumped into a deal I could not refuse on my suspension, I'd have the TEIN coilovers myself. Coilovers ftw.
As far as the system, a friend had a false floor raised about 3 inches with an Image Dynamics IDQ 12 in a sub enclosure in the spare tire well and it sounded real nice and smooth in there. Don't need too much in that car unless you're an animal with the volume.