Not to rain on your parade, but have you done any long term RV'ing before? Seems like you've done a lot of reading, but very little doing from your OP.
I suggest you take into consideration that your first attempt at this will not be your correct answer. Budget accordingly!
As far as your original questions is concern, when we're on the road the ones with the Spartan tend to go farther per day, and talk them up more.
Not to many rigs on the road tow a trailer/garage combo. The last big one I saw hooked a picnic table and tore the heck out of the table and trailer as they were pulling out of the site.
Thor seems to have their problems. Maybe QC has gotten better.
