In a very general sense a higher quality unit is going to weigh more. IMO it depends on how much time you are going to spend in it. If full-timing you should have one rated for that (many aren't).
When purchasing my 35' Keystone Hideout it was parked in the service bay next to a 33' Heartland. I couldn't help but notice my dry weight was 9000# and the slightly shorter Heartland was almost 11,000#. I love the floor plan of mine and really liked the price but if I were planning on using it a lot I never would have got it. Realistically, with work and kids I probably spend +/- 30 nights a year in it.