The first step on my road to an eventual car pc was to get a better sound system.
Heres what's in it:
6 Polk/Momo MMC650 Speakers
Kenwood eXcelon KDC-X492 head unit
3 Rockford Fosgate Punch P325.2 amplifiers
No subwoofer yet. This system is more about quality than loud bass so the subwoofer I eventually get won't be anything too impressive.
I have this all shown on a page on my web server:
http://paulf.dynalias.com/car/
Let me know what you think!