Thanks, Ken.

My wife would never turn down an opportunity to take a trip into the City, and I think I know right about where they are located. I assume this is the place:

Peter's Auto Radio
2106 Lombard St
San Francisco, CA 94123-2713
(415) 567-4678

I've noted that a number of shops listed in the book indicate how long they've been in business, and I've seen places come and go. Besides looking for a business that has been around for the last number of years, any suggestions for a few good questions I should ask any prospective installer?