I highly recommend the Pioneer AVH-4100 NEX. I had the installer put switches in the tiny cubby hole at the bottom for the cams. There are other models that have GPS. I already had the Garmin RV 760 mounted on the dash above the instruments. I prefer that over the radio GPS because it has my RV dimensions and also has RV POIs.
The Pioneer is great. Brighter screen that pivots for glare elimimination. Apple Carplay, HD Radio, and the Bluetooth.
Added: HWH Kick-Down Leveler; RoadMaster Anti-sway bars; Tornado Rotary Tank Rinser; Accede Backup Sensor Kit; cylinder locks (w/one combo lock); custom sink cover; Kenwood DDX 5706S front radio; Pioneer MVH-X5560BT rear radio; Oxygenics Shower head; ScanGuage II; Blue Ox Tow Bar w/RVi Brake 2; Winegard Rayzar Automatic TV antenna; Trimark Steel door lock; Dometic 310 toilet; whatever is next.