Thanks for the info... OK, I just re-read your posts. I wouldn't mind loosing the rear controls because I guess there is a stand alone remote control for the Avic-Z1 specifically for rear seat zone use (CD-RV1 $15 retail). As long as I could still send the video signal to the rear screen, I'd be fine removing the stock DVD player.
Were you suggesting it may cost me $400 or more for the install of this beast?
I've been shopping around for the parts I may need and found all the add-ons for the Bluetooth (ND-BT1 $110)) and XM (GEX-P920XM $90) and backup camera (ND-BC1 $188) on eBay. The actual HU I am still shopping for. I may opt for a higher priced unit if I can purchase it from an official distributer. So far though, Amazon has a great price on it ($1678) but it can be had for much less on the Internet. As long as I can get an extended warranty, that would be OK I guess.