I have always found Sylvester Electronics to be helpful when I call. It is nice to have a company that actually answers the phone when you call. They also offer a wide selection of mobile audio making it easier to order from one place.
Sylvester has the feel of a local business that cares about their customers. They always answer the phone (no robo phone system). They are willing to walk you through all tech support needed for completing the job.
Sylvester always has a friendly and helpful attitude when I call. The staff has a great deal of knowledge to help you through any of the toughest installations. They always answer the phone which you don't always find.