My experience with "C"s is limited to two rentals in AK. We all loved the one we had in 1992 but that is out of the question as Rockwood does not make motorized units today.
The other was a 30" Winnie with no slides, it worked great and had tons of room. But I would not recommend it for your stated purposes.
We have owned two "A"s, a Bounder 27D with twin beds and dinette and a Winnie Adventurer 32V. Both have taken us on extended trips with a variety of family members. From my short 20 years of motorized travel I would list them in the following order;
1. 25B
2. 22R
3. 22M
4. 26QB(Leprechan)
5. 26A
The 25B has both the dinette and sofa and for the reasons given by others the Dinette is not comfortable. Our Bounder had only a dinette and I grew to hate the table top. Very odd edge(sharp 90 degrees) and very odd height. I'm was 6'2" back then and just didn't work. The corner bed with a duvet is really comfortable and easy to make in the mornings. Boys can each have a sleeping spot without having to mess with the dinette. Not having to make a preteen or teen so you can sit and have a cup of coffee is nice. No slide is nice.
22R Looking forward a few years and no boys, I just like the floorplan. The "U" dinettes are almost a couch and really comfortable.
The 22M is doable but it has a slide which is another thing to fail. Slides are great and I love ours but... It also limits your flexibility as far as driveway and sports arena parking.
The 22' models are small and no sofa is a drawbak.
26QB My biggest concern is that the Leprechan is really long. It is not going to fit where the 25B will fit in your driveway. Leprechan's are not as nicely finished as the Winnies and the Winnie manuals and parts lists are nice to be able to download.
26A is also long and three slides in 26 feet is more than I would like to have. My least favorite floorplan by far, it just too much stuff.
We are spoiled by our rig and it's features but it is not for everyone. We are starting to sit more and drive less as we enter our late 70's and it is more like a house than other rigs we looked at. There are others that we like a lot, but we don't want a big old payment, that can buy a lot of gas, however, if the money were not a concern we would have a Winnie VIA 25T in a heartbeat.
"I travel not to go anywhere, but to go. I travel for travel's sake. The great affair is to go". R. L. Stevenson
David Bishop
2002 Winnebago Adventurer 32V
2009 GMC Canyon
Roadmaster 5000
BrakeBuddy Classic II