Sometimes you just get a good feeling from someone right away. That's the case with this place. Roby (I think that's how he spells it) does great work at reasonable prices. He also sells great speakers at reasonable prices. I've been here twice and I was so delighted with the service that I might just keep upgrading my car stereo just because the service is so good.
Also, there's a Tim's right across the street, so you've got a place to sit and do a bit of work while the installation is going on.
Oh, and thanks to Tony F for the recommendation.