The bluetooth link with phone seems poorly thought out on Garmin's part. Plus it overrides your phone's link to your truck. I'd rather use the truck speakers and microphone with the phone rather than the small garmin jammed up under the windshield. The data link to the cell is supposed to warn you about weather and other conditions that impact your route. I don't know about you, I just check those things when I stop for gas or lunch.
Get a weather app for your unlimited iphone and set it to play an alert tone for you on bad weather.
I did not know the RV760 was discontinued, just bought one new over black friday weekend.
Comparing it to my ten year old 4" Nuvi... The Nuvi has features to track your fuel economy, that costs extra on the 760. I miss the little shutdown summary the Nuvi had - miles traveled, time spent, fuel used. The 760 just says shutting down, no summary.
I do like the big screen. I was spoiled in my last truck with the 8 inch uConnect Nav / Garmin built in the dash, combined with voice control it was very handy. The 760's voice control seems to work well, don't have to shout at it. I just need to forget all the commands from the old truck and learn the new ones.