I don't know how much money Thor saves by using the 350 over the 450 chassis, but a larger capacity would be desirable. We saw the 25.1 at the Tampa rv show, and the wife didn't like the rear queen because it was not a true walk-around and making the bed is difficult. And, the lack of a side slide-out makes the living area too small. I did note that the quality control seemed much better on the new coach than on our 2014 Vegas. We have extremely poor, sloppy exterior caulk and adhesive application, interior mistakes and sloppy or non-existent sealants in the bathroom. It did appear that some of these issues were much improved on the new unit.