Ever since I bought this car I have been disappointed with the sound system, to be fair it had a non functioning Pioneer when I bought it. I replaced that with a Kenwood DNX690hd, for about $500.00 from Techtronics. It was supposed to have been factory refurbished but those guys were schetchy to deal with (item not in stock, but maybe we have this one in stock, we are not sure) and the pictures of the discounted Hertz HSK on their website are pictures of fakes. The head unit is working fine and supposedly has their two year extended warranty.
I used Stinger Roadkill sound deadening through the hatch area and doors. I chose it because it was well rated and the lightest weight available. $100 on sale from Sonicelectronics.
In the past few months I have already put $600 in the sound system, there will be another $500 spent replacing the Bose amp, wiring, and speakers.
This is what $500 bought...
Crunch P1-5050.5 5-Channel Power One Series Car Amplifier
Belva BAK44 4 Gauge Amplifier Wiring Kit w/ 4-Channel RCA Cable half price with amp
Rockford Fosgate R2SD4-12 12" Prime Stage 2 Shallow Subwoofer
American International SG-600DX (sg600dx) Speaker Spacers & Rings
Atrend 12MG 12" Protective Waffle Subwoofer Grills
Atrend S12 12" Carpeted MDF Speaker Spacer - Sonic Electronix
SIRIUS XM V200 SXV200V1 Satellite Radio Vehicle Tuner 2.0 (SXV200)
total shipped $280.81
Hybrid Audio Technologies Unity U61 2 | eBay
For $210 shipped (I cheated here, used speakers for half price from someone with good rep for HAT products.)
I will post pics with homemade sub enclosure over the spare in the next couple days.
Doing this in stages was not so much a hit for the wallet or grief from the wife.