Thanks for that link, Jeffdachef! I'm going to check into that for sure!
But, for now, I am absolutely floored. First, I ordered that amp from Sonic Electronics who aren't too far from me, one state east, and it got here yesterday. Got everything wired up today, and it sounds incredible! No distortion, no nothing! I got everything up and running and dialed in pretty good, and I am amazed. I'm going to have to dampen my trunk first, because it rattles like crazy. It's mostly my tail lights, but I'll attack it with stuff from this article. That's the nice thing my little old BMW, there isn't a lot of plastic. My door panels are thin MDF covered in pleather, dashboard is padded vinyl, headliner is cloth, and everything fits together really well. Not something I can say for newer BMWs, I must admit. I'm just not looking to add a ton of weight to my car. I built a 450 HP car to go fast, and adding 200# of sound deadening will kind of negate that. I'm actually looking at reducing weight (lighter carpet, removing unnecessary systems, racing seats, suspension components) while retaining my "Daily Driver" status of the car (nice stereo, complete interior, etc.).