New here but I'll probably be around a while. I have an avic z1 upgraded to a 40G hdd and all the info from a Z3 hdd copied on that hdd, so I guess for all practical purposes I have a z3. I also have the Pioneer IPOD adapter and XM adapter installed. And since I have a Dodge Truck I also have to use the CanBus adapter. A lot of stuff crammed in the dash but it all works great!!