AZ99,
Thanks for the input regarding the M2 and it's driving habits.
The Dynamax units we looked at did not have a floor plan that we liked. The Renegade is very nice, but they are very pricey. We have visited with the Showhauler folks, but really don't want a Class 8 truck chassis due to the extreme length of the units (usually in the 45 foot range).
The Seneca on the M2 chassis fits our desire to have a heavier chassis, but remain under 40 foot overall length. Plus we like a couple of the floor plans. We have had good overall results with our Seneca and have no issues with purchasing another Jayco product.