This has been a greatly informative thread, and I will probably join the "owners club" soon. I am coming late to the topic but wanted to throw out a word of caution. Please always remember when using backup monitors on tall vehicles that the cams (usually) do not show overhead obstacles.
I recently learned that a US company with about 100,000 delivery "trucks" had added backup cameras to their fleet a few years ago. After adding these back-up monitors their backing accidents actually increased due to drivers having the additional confidence the cameras provided and then forgetting to watch their overhead clearance.
'04 GMC Sierra 2500HD, CCSB, D/A, MaxBrake, B&W Companion, Retrax Pro, AR Power Steps
2013 Rockwood 8289WS w/Diamond pkg
1969 Camaro RS/SS Convertible
Dad's old 1968 Empi Imp (recently recovered from under 21 years worth of boxes/dust)