This probably won't be popular, but I'd recommend that you keep the class A. Assuming you're happy with it and it's in decent shape. Without knowing the specifics about your class A, you will be giving up about 4' of living space, probably 1,000-1,500 lbs. or more of cargo carrying capacity, storage tank size and that great view out the front window while travelling...to name a few. Maybe a downgrade from 50A service to 30A electrical service and/or hydraulic levelers to boot? Plus, I assume, it's paid for.
🙂Almost all of the long C's on the E-450 with slides will be stressing the rear axle weight limits. If you really need 30+ feet and slides, I'd recommend the super-C's if your dead-set on a Class C. Or else, plan on eliminating a bunch of stuff you currently carry in your A. The down-size in cargo carrying capacity should be considered carefully.
When we were doing our shopping 10+ years ago, the kids loved the overhead bunks of the C's we looked at. But when it came right down to it, they were happier with the extra space in the A. Kids will sleep anywhere. Plus, I was the one who was going to make the payments! LOL
Or, if you're itchin' for a different rig, check out some of the used class A's out there which might have a different floorplan than yours. There are now many A's which have bunk beds in them. Although, personally, I'm not a fan of those either, but many families really like them.
Whatever you choose, Good Luck and have fun.
~Rick
2005 Georgie Boy Cruise Master 3625 DS on a Workhorse W-22
Rick, Gail, 1 girl (27-Angel since 2008), 1 girl (22), 2 boys (23 & 20).
2001 Honda Odyssey, Demco Aluminator tow bar & tow plate, SMI Silent Partner brake controller.