After a couple months of spec'ing out what I wanted, and a lot of help from here and Nabisco...its in, done, and works. Here's the final config. :
HU : Alpine 9830
w/ Forester Din pocket
Front Components : Diamond Audio M661
Comp. Amp : US Acoustics USB2100
Sub : Diamond Audio CM3
Sub Amp : US Acoustics USBD600
about 40 sq. feet of Raammat used in doors, trunk lid, and trunk, along w/ 20 sq. feet of 3/8" closed cell insulation.
I put the crossovers up in the dash, one above the dead pedal, one behind the glove box, mounted tweets in the A-pillars, and the amps under the seats, mounted to 1/2" MDF which is vecro'd to the floor. 16 ga. wire to all speakers. Sub is in custom Wagon enclosure from Evolution Auto...he sells them in group buys every once in a while. I ripped out that plastic crap on the doors, cleaned them w/ mineral spirits, applied a layer to the outer door skin, then sealed up the middle panel as best I could, and then added foam on top of it. After listening to just the front speakers I decided not to add any rear fill...sounded perfect as it was, and I don't sit in the back seat of my car, and those who do aren't helping me install this thing...so I have some extra rear speakers now. I removed the stock rear speakers and sealed up over them.
Now onto the pics
1. Tweeter in A-pillar (thank you Dremel)