ernie1, Take a look at the Bigfoot Brand. You will not be able to buy new, but are some really nice used out there. If you find one with the Winter Pkg., You'll get thermal pane windows,motoraide waterheater,auxiliary rear heat, SS wheel simulators. The tanks(all) are inclosed, so if you keep the inside warm...your tanks are warm. Ours (a 30MH26Sl) has a double SS sink in kitchen, a three burner stove, a (real) oven, separate bath/toilet( actually has a rather large tub about 14 or so inches deep), and the bathroom sink is outside the toilet/bath area with some counter space. It's pretty amazing what you can put into 26 feet, plus some of the best quality we've seen in the class c's. On a side note: the previous owners were avid cross-country skiers and winter tested (with water in system) down to -17F and didn't freeze anything. We wanted a quality unit capable of cold weather camping, and think/hope that we found it!
All of the 30MH series are on E450 chassis, as they are heavy, well built units. Structural integrity comes at a price....weight!
You can archive some of the model year brochures on the internet!