I've had Rostra B/U cameras on my last three trucks and have been very happy with them.I can't speak to the wireless models, except that I did not see many positive reviews on them, prompting me to go with the Rostra. The monitors imbedded in the rear view mirror has very good resolution and clarity.
2015 Seaark 1872 MV CC Etec-90
Helix 12 CHIRP SI, HB 1199, MinnKota Riptide ST80/i-pilot Link, Bob's Hydraulic
Bitter Gun Owner