Not sure where you're located, but if near Kansas I'd strongly recommend looking at the NuWa factory/service center in Chanute. We just picked up a 2005 Discover America there. As the manufacturers they are familiar with NuWa, they went through the unit and appear to have replaced many items (slide rubber, step box, awning, toilet, pin box, etc). Though not new, we are very comfortable the unit we took home is in good shape.
Besides, the people there are very nice to work with and gave us a good trade on our previous TT. I know they carry other brands than NuWa as well, but obviously they specialize in NuWa.
Good luck in your search, you seem to have narrowed down the list to higher end units that should serve you well as long as they were cared for by the previous owner.
Ron & Pat
2022 F350 Lariat CCSB SRW Diesel
2019 VanLeigh Vilano 320 GK