I am more interested in audio performance, but not competition.
Here's what I've installed.
Source: I have a Clarion head-unit connected to a Massive EQ. I plug my 5G iPod directly into the Clarion line-in, not some cheap radio transmitter.
Amplifiers: I have an older HI-Fonics and 2 Kenwood amps running off of 4awg wire through a Rockford-Fosgate Capacitor.
Speakers: In the stock positions (doors and rear) I've installed 4" Infinity Reference Series Speakers. My Hi-Fonics amp powers the 5.25" component Infinity Reference Speakers that I built boxes for and place just in front of the front seats, beneath the driver's and passenger's legs. The smaller Kenwood amp powers 2 6"x9"s that are in boxes in the back of the trunk. Last, I have a 1000w amp powering 2 10" DVC Concept subwoofers in a bandpass box.
I am very happy with the sound quality, but I need to purchase a new alternator, blue top Optima battery and 3farad capapcitor, and some day, better 10" subs.
I also want to build a custom box for the trunk that will direct the subs upward and have spots for the 6x9s, plus hide-away places for the amps and capacitors. The board that is located over the spare tire needs replaced badly also. This project will probably be for summer 06.
Hi-Fonics Amp and Fosgate Capacitor between rear seats and sub box:
In the shorter future, I am planning on getting new performance shocks and lowering springs. I drove this car in Detroit over the past winter with all their snow, and I don't know how I kept it on the road with the way the suspension handled.
Thanks for viewing.