My system sounded just fine with a few light mods (see sig).
However I've outgrown it, and I just ordered a Kenwood DVD 7 incher with Nav, a Kenwood 5 channel amp, and a nicer MTX sub for my enclosure. It's never ending, at least for me, to build a car stereo system. I'm always looking for a little more.
Kinda like crack.
2012 Kona Blue 3.7, M6, 101A, security package, built 5/3/11. Mods:
The list is long, like WRXified's winky used to be. Other junk:
1994 Z28 conv LT1 A4 - 1965 Custom 2dr 390 M4 - 1962 Galaxie 4dr 427 A3 - 1979 Firebird Formula EV (work in progress) - 1967 Austin Healy Sprite (basket case)