Which is the best unit for a front and rear dash cam AND front and rear parking cams?
 

I have a 2005 Corvette with base factory single CD player. I already have a rear aftermarket camera in rear license plate installed with a separate monitor that resides in cupholder. I got a front dash cam. (I also now need a rear dash cam or a system that does monitor both front and rear). Right there that is two external plugs used up- one in center console and one in compartment below ventilation system (ash tray).
I am also running a few other accessories using an 3 prong accessory plug.

Is there such a headunit like I keep hearing about these Pioneers and Kenwood stereo receivers that get Satellite HD radio, Bluetooth that can incorporate all of these cameras into that one screen on headunit? I am hoping this would cut down on all of those external wires and using up accessory plugs and space in Corvette.
I already have two separate navigation units a Tom Tom and a Garmin (when needed) I use via windshield mount and sand bag dash mount that I prefer because when I have problems all I do is replace that unit with another new unit so I want to keep this aspect out of the sound system but hopefully use that monitor screen in sound system for the front and rear dash cameras and front and rear parking cams.

:lurk::bigears