Need recommendations on great stereo installers in Southern California

[icdc]

I'm considering stereo upgrade w/ better speakers, an amp, and a sub. Maybe a capacitor as well. All these will be connected with the factory Navi unit.

I prefer a setup that produce clean and crisp sound, rather than plain loud noise that annoys ppl on the road when windows are rolled down. 99% of time I listen to music with windows up.

Can someone recommend me GREAT stereo installers in SoCal? I need real professional stereo installers who will listen to me and answer my questions, understand my needs, and put into a package that suits real needs rather than just earn my money. Service and Installation Quality are my top two priorities.

[icdc]

Talked with my frd who has a S2k and he highly recommends a professional installer who serves many S2k folks. Will follow that route.