Well, listening to all of these mods is one reason I regret getting the integrated DVD & 6 CD Changer & steering wheel controls. Basically to do any upgrading, I have to replace everything (including the roof liner and center console). It would be sooo much easier to start upgrading from scratch.
It's not all a happy story on my end. I have tons of problems with my system. I'm currently in dispute with the installers and they pretty much refuse to talk to me now so I put a stop on the credit card charge. I have to deal with parts of the car all cut up, panels that don't stay on well now because of all the cables under their, a noisy power inverter, a CD changer that doesn't play any CD's (I wasn't able to test it until today because I finally found where I put the magazine), and an overhead screen that doesn't show inputs from my AUX-2. I wished I had the factory one installed. The grass is always greener on the other side.