I installed that 5200 Dexter axel on my 1700.
No issues with height.
My Reno was a complete.frame off reno. There is a lot of talk about the frame being strong enough but that was not the case for our 1700.
I had to strengthen and reinforce the frame.
If you are adding considerable weight
I would definitely recommend the 5100 Dexter.
As indicated by others I think the key is your springs so it doesn't hop and bounce your inside around.
You dont want too much travel in the springs so I agree with the others who said get your trailer weighed so you know what you are dealing with.