RE: Back-up Camera
The only advice I can give is to stay away from any wireless kits. They are garbage. There are 2 on the market now and both don't work very well. The Nav system that you are talking about, is it a factory nav or aftermarket? The reason I am asking is if it has a aux video input. If it does then you can get a camera that will mount to your plate for around $40 and wire it directly to the nav system using RCA cable. You will need to check to see if the nav monitor has that input.
Black 2009 Caliber SXT with some beach package