I have a Garmin 65W dash cam which I really like and I believe the early model Garmin 770 which I also like. If the the 785 was available then I might have considered it. However the 65W is such an awesome device on its own I might have stayed with them separate.
Compare the camera and function in the 785 with the wide angle camera and function of the 65W.
Good luck.
Jan and Rocky
Volunteers for USFWS. 29 refuges with 9300 hrs ea since 2006. 2004 Allegro 30DA, Workhorse 8.1, Banks, 2012 Jeep Liberty Jet, Blue Ox Aladdin, Brake Buddy Advantage Select, 300 watts solar, 5 Optima group 31 AGM's, 2000watt Ames PSW inverter.