I can't help with your question directly, except to cheer you on. I really wish I could have gotten the super c version of my floorplan!
class C's a really great to fill a niche IMO, great for families with the extra overhead bed and the properly designed cab is nice. Most argue for class A's giving more space, more roomy feel, etc... I get that for couples, etc...but for a family or something...anyway, we really like our C.
That said, the larger C's like mine really overtax the 450 chassis,and teh design limitations drive them to put in tanks that are too small, limited tow capacity, etc.... most everything fixed with the larger 550 chassis.
Anyway, good luck with your search. I suggest getting inside the floorplan before you get too serious. You'll know pretty fast if the plan works for you. RV shows, window shopping at dealers, etc... You can get a feel for things like seating locations, is the TV in a good place visible or not in the way....if there's enough storage or counter space, etc...