Head Unit: Pioneer Premier P740MP - $275
Front: Custom Components (Vifa & Soundstream) - $100
Rear: No thank you!
Amp: Lanzar 4ch rack amp - $75
Sub: Lambda Acoustics PB12-LE - $79
Coming Soon,
Sub Amp: Lanzar 2ch rack amp - $65
Active Crossover: Audiocontrol 2XS - $35
Grand Total - $629 (add another $100 for wiring, carpeting, box building supplies, and misc).
I might swap out the Lambda for a pair of Dayton Loudspeaker IB12's and go with a free-air setup to ditch some weight. The current box weighs probably 70lbs!