$180 Sub Box

$160 Dayton Reference 12"

$570 Pioneer Nav reciever

$200 5 channel amp

$170 Front speakers

$60 amp kit

$70 sound deadening

$20 rca cable

Right up against the budget, but no compromises here. Should sound awesome. Rear speakers are superfluous.

https://www.amazon.com/gp/aw/d/B005CIJBKK/ref=mp_s_a_1_2?ie=UTF8&qid=1470704575&sr=8-2&pi=SX200_QL40&keywords=4+gauge+copper+amp+kit&dpPl=1&dpID=51xFJ8vpmWL&ref=plSrch

$300 Front

$0 rear- keep current pioneers

$235 Sub and box

$220 5 channel amp

$60 wire kit

$160 sound deadening

If you look around hard enough, you could save some money buying welding wire vs a amplifier kit, but probably not much after inline fuses and spade connectors and such.

Front components are a plus, yes.

Rear, leave alone unless there is something wrong with the ones you have

A million ways to go on amps, but I went for simplicity with a single amplifier doing everything. I would bridge channels 1-4 into your front components and run the rears off the deck.

Dayton UM is my fav metal sub of all time! Diggs really deep for a sealed sub, and never sounds sloppy.

Dynamat is a big yes, it's really the only way to get that tight mid-bass out of a leaky door "speaker box", floors cut road noise, rear deck can help out midbass for the rear. Trunk kills rattle, etc.

Assuming you can't fit component speakers...

$130 Head unit

$55 Speakers

$180 Amp

$115 Subwoofer

$40 Box

$60 Amp kit

$8 More rca cable

Order your head unit by phone to make sure you get any controls and harnesses you may need. Forget the rear speakers, bridge channels 3&4 into the subwoofer. Don't forget to seal and deaden doors