Thanks all for the input.

Uzbad, the first point was regarding theft (not a broken H/U). On the second point can I use the stock speakers and amp that come in the Rockford Fosgate system, with an aftermarket headunit? Do you have links to people who have done this? Or point me in the right direction? I've been doing searches but come up empty.

HugoX, looked at the phatnoise stuff, interesting. My stock headunit has a built in changer, and no external changer controls. It's the rockford fosgate H/U. Will the phatnoise components still work?

Thanks all for the help.