[AceX]

You could save a few pennies by going to a lower end deck, but I have a soft spot in my heart for the 5900. I feel it has the best balance of adjustablity, quality, and ease of use.

I can't seem to find that control module I mentioned, but I'm going to call a buddy of mine tommorrow who installed one on a car a few weeks ago. He'll know where to find it.

If you can spring for it, get a few small bits of Dynamat and place a little behind each speaker. Probably 1ftsq behind each speaker will do, just to keep the echoing inside the doors to a minumum.