This is an old thread, but the reason to choose a Super C is mostly for the floor plans in a more roomy size. Like a normal C class you can have more sleeping areas, some have a bed over the cab, 2 sofa beds and a booth that can sleep adults. Some are better than others like all types.
Then you have the Class 8 truck conversions, those are primarily desirable for people who tow large loads. A class 8 with two rear axles can easily handle a stacker trailer with two cars and whatever else you like to haul. Its a good option for hauling a Jeep and a PWC trailer inside plus a motorcycle up in the front attic.
They can come with quad slides and big over the cab beds. Some offer extra height ceilings so an adult can use the bed over the cab or that area can be used for storage etc. I personally prefer the cut out type, better entry into the driver's seat or flip down the bed and park two kids up there.
If your going for a truck cab, then why not get one with real towing ability? But, they do drive like trucks, shift like trucks etc. A nice sized all around Class 8 to me is 38' overall with a single rear axle, nice flexible unit if your not towing a huge trailer. And the 38' size will keep you under 65', easier to maneuver! You can easily pull 10K like its not back there. You can tow a 20' stacker trailer (24'-6" OAL)with a full size car and toys on the lift and still not over load the rear axle. Plus if your load puts more than 20K on the rear you can go with a twin screw, but you give up storage and add 4 more tires. Either way, a Class 8 will handle a full size truck as a toad because most have over 1550 in torque and 12 speeds or more. On the used market some have 515 hp Detroits with 13 speeds and Volvo offers 435, 475, 500, 600 hp etc with their 12 speed transmission.
The nice truck conversions have solid wood doors, real tile floors, 200 gallon water tanks and many different holding tank set ups. Optima had 150/150 with 200 plus fresh. You can stuff in lots of weight when you have 58K GVWR or more. Most Super C's I looked at were maxed out just with a normal load of stuff inside, the big issue was the weak engines and light duty autos. I would go with a strong Class A with a big engine and go for one with a 12K, 15K hitch etc. Or a Class 8 conversion if you need to tow more than that. Better to have too much truck than not enough.
You can tow a few full size trucks 4 down now, like the current F-150 trucks. I can pull my Dodge 3500 4x4 DRW as a toad if I wanted, but its really not practical. I prefer a CRV, Wrangler or maybe a Ford Expedition behind a motorhome. Pickup trucks are a long, but I have thought about pulling a truck and using the bed for a motorcycle. So many options out there. My next rig will be 38' or less, I'm tired of huge rigs myself.
I like Class C or Truck Conversion style of floor plans now, its nice having more sleeping areas IMO. Some can't live without the big Class A windows, thankfully we have options. By our 4th or so RV most still keep trying different layouts. :)
