We downsized to a B. There are a lot of nice ones to choose from with different features. We ended up with the Winnebago Era because of the layout, a larger fridge (DW has celiac disease so must be GF), good storage (relatively speaking :W), Truma Combi heat/hot water system and probably others. We are much happier in the small unit than our previous DP just because of the flexibility it provides when traveling. I find our black tank only lasts 2 people 3 days but it isn't a huge issue. Our chassis is the Sprinter 3500 so weight is not a big issue for us.
Dave