If you are moving from a tent to a TT, I will give you my standard advise; rent what you think you want.
Tow it, park it, live in it for a week or so and you will know if you want to pull one of these barns down the road. Manipulating though three or four campgrounds or state parks, hooking and unhooking, leveling, electric only or full hook-ups are hands-on experiences.
All the brochure analysis pales in comparison the feel of 6000 #s plus on your bumper.
Buying a TT is not a race. It is an expensive item that depreciates rapidly.
Good luck