It's been said time and time again about these shops. You gotta remember when you first got into it...you probably thought MTX or JL was the shit because that's all you knew. A lot of these guys have no idea what's out there because their jobs don't require them to. They don't hop on forums to learn about installing because it's probably hard to swallow their pride. Plus they are used to people bringing in subs like Sony and Pyle, so they immediately discredit any more small name brands they hear about.
I don't have any shops do my installs, but I am friends with all of the guys who run them. They happen to be pretty cool and when I mention I'm running Fi, DC, T3 etc... they want to hear them.
These guys would like to pick up the lines I brings to them, but due to the economy they are stuck with what they have. Car audio picks up during the spring months, but it's not enough to keep them going. They survive on alarms and remote starts.