I would like to update the sound system in our '90 Jimmy. It is bone stock expecp the rear speakers have been replace w/ 4x10 Ecliplse. The whole thing sounds like hell. I am totally illiterate when it comes to knowing anything about brand names and which set-up to use. I would like to put in a new cd changer, an amp, and new speakers. I have read enough of the posts to know what everyone thinks is crap, but what qualifies as good, will hold up to the stresses a 4x4 vehicle will put on it and is reasonably priced, or is there such a thing. I do not want a flashy high dollar system because my son drives the Jimmy to school and real good stuff has a way of disapearing. Any thoughts would be appreciated.