I decided to go with a wireless camera that replaces one of the license plate lights so it looks as factory as possible
I have a 07 G35S with bose, but no NAV. Screen needed to be hacked to work while in motion and you need to press AUX to view image.
Total cost was $35 for the camera / wireless transmitter & receiver and $2 for a cigarette lighter phone charger.
Installation was simple, remove one of the license plate lights. And screw the light bulb into the new camera. Feed the wires through a hole behind the license plate. The power for the camera and transmitter comes from the reverse light bulb wire (orange)
Then I took apart the phone charger, removed the guts since it outputs 5V and wireless receiver needs 12V. Solder, tape, and put back together. In the arm rest, just plug the RCA connector from receiver and plug the phone charger into the car power outlet.
Results. Overall, pretty please with the result aside from the top couple of millimeters of the image is blocked by the bumper