has a 175FB with a double. I think replacing/converting the dinette in the 175CB with a double bed would result in a better floor plan. Their 21 and 25 foot floor plans have permanent beds too and much larger CCCs but then you'd end up like us in a 3500 Diesel!
We personally like the extra width of Bigfoot
and Lil' Snoozy campers. It doesn't seem like much but it makes a huge difference. Do you have a bed size you are targeting or just the idea of a permanent bed? Very easily, any dinette can be converted to a permanent bed. If it was just me, with no plans to be +1 and if the fur babies are OK with the couch, I'd convert a 2 person dinette to a single... Bigfoot
175G or Casita
Spirit 16/17. I just think that would be a better use of space for a permanent bed.
If you need/want larger then any full dinette can be converted. You could add full extension drawers underneath, if the floor plan allows, which would make getting to the under bed stuff easier. We originally wanted a Bigfoot 21RB but found a 25RQ. The biggest reasons for us to get it instead of a 21 were cost and tank sizes. If it were only up to me I'd replace the jackknife in the front with a double and turn the bedroom area into a living room. At this time I'm over-ruled.
Don't cross those without permanent beds off your list entirely since you can make them fit you with some changes. I'd make a second list of campers that would be ideal with a few changes. I know how frustrating it can be looking and hoping a camper comes up. You may need to take a vacation to an area that has many more available to at least get inside them.