I got around to fixing some of the rattles. On the drivers side, there was a gap between the door panel and the door; so it rattled a bit when the bass hit. I stuffed some sound damping material (sorta like dynamat) between the two and it fixed it.
On the passenger side, turns out i just didn't screw the speaker all the way down to the spacer. So the speaker itself was rattling. That's fixed now too. Now the only signficant 'noise' I can notice is the plastic water liner thing; it flaps around a little bit due to the air being displaced by the woofer.
