Welcome to the forum. We have never owned a Furrion. We have 3 TVs IN our fifth wheel and 1 that we use outside. They are different brands, one is an RCA, one is an LG , one is a Sceptre and the one we use outside is a Samsung.
Our RV was used and the RCA was in there when we purchased. We added the LG to our bedroom, the Sceptre was added to the bunkroom and the Samsung was used at our house.
We travel anywhere from 1,500 miles to 4,500 miles each year and have never had a problem with any of them from vibrations...no problems of any kind.
I would suggest that you just purchase whatever you can find that is cheap and if it tears up, get another one for what you would pay for the Furrion.
We just ran a cable wire from our inside through the refrigerator vent and plug our outside television up in the receptacle, pull the wire through (we push it back in to travel) and we are set and ready to go outside.