Need help selecting TT for small family

Our family of four has a Rockwood minilite 2504S. It is a big small trailer or a small big trailer, kind of right in the middle. I love that each boy has there own bunk to sleep on, and the wife and I tend to have afternoon naps on the bottom one, it is just so cozy. I also love the Murphy bed. Most small campers you either choose two of the following three, couch dinette and bed. The Murphy bed allows us to have a couch and bed along with the dinette. It also has tons of storage, no single big compartment, but many small ones. The only thing I dislike, and you will find this I. Almost every half ton Towable camper is the small holding tanks for black and grey water.