Well, $2000 is a great place to start. AND, your looking into good SQ.HU: Alpine 7995, can be had for $300 on the net. PLUS, it DOES NOT have an internal amp...since suggested setup will have an amp to power speakers, no need to waste money on a HU w/ an internal amp you won't use.
Speakers: CDT HD-62ef 6.5" components
http://www.thezeb.com great set of components, no need for rear fill with these. $200
Speaker amp: US acoustics 4065, great amp... look for it online. Bridge this four channel amp to get 160x2 watts rms...great for the components. ~$150
Sub(s): SQ oriented...2x Stereo Integrity Magnum d2 12" great subs, rediculous SQ and will get loud! $600
Sub Amps: 2x PG Tantrum 1200.1 or 2x Hifonics bx1000d's....either are a good choice. $450-600...cheaper to go with the hifonics
BOX:
http://www.gnomeaudio.com Donn will build you a great custom box. I'd go sealed in ur probe...and since you want SQ. Give them 1.5-2 cubes each. So a 3-4 cube net box for them would be great. $60~120?? should NOT be too expensive.
Electrical: OK, ur car may be good for you...but seriously the electrical system REALLY *****. My BEST friend had a probe...and only had 400 watts rms and some neons and his alt was pukin on him and battery was dyin. SO, you NEED to look at
http://www.excessiveamperage.com Nate will build great custom alts that put out their rated amperage. A High output 200 amp alternator usually runs around $280-300.
$2050 or so....great system and would include EVERYTHING you need including electrical upgrade. I tell you, YOU HAVE to have upgrade ur alt. Peace.
NG