We have a 2006 Mandalay 40E. At that time it was a "second level" coach in their product line. It has the Freightliner chassis, independent front suspension, ISL 400 hp engine and the side radiator chassis.
The Presido line was Thor's entry level diesel coach in 2006. It would have the solid I-beam front axle, a smaller engine and the rear radiator chassis. If it's anywhere close to the quality of our Mandalay, it should be a pretty nice coach.