Last summer we replaced our junk Lippert jacknife sofa with a Lambright Harrison double recliner as in the photo (plywood end tables are a mockup). Very high quality and well designed but not cheap. It's very comfortable. They have other models that are even more comfortable. We got the power recline option which we both love and use a lot. Lambright furniture is specifically designed for RVs and will be no issues getting it inside. Lambright is available at a number of dealers across the US such as
Glastop. The Lambright furniture breaks apart and each seat section, console and backs are separate sections that clip together in seconds without tools. The guys at the shop where we got ours from had it installed in a couple of minutes.
We searched every corner of the internet and went to many local retail stores before settling on Lambright. There are some RV furniture places that have some on display. We got ours from a shop south of Seattle that had a lot on the floor you could try out and look at.
If front to back dimension is an issue, you need a true wall hugger. Many/most recliners we looked at in retail stores aren't a true wall hugger design. The quality wasn't as good as the Lambright despite the high price on some of them. The cheaper ones may look fine at first but can start to deteriorate 2 or 3 years later. We bought a nice looking theater seating setup at home and a few years later the faux leather surface of the fabric started to come off.
If you want power recline, the buttons are usually on the outside of the arms but that may not work in an RV. Our buttons are on the inside of the arms. If you are replacing a standard jacknife sofa, you'd probably want a 58" wide double loveseat because that will give you approx. the same overall seat width and you'll be able to lay down on it. Ours is the 54" model and isn't quite enough to take a nap on.
If you are installing new furniture on a slide floor, if your slide floor is like 4-6" off the main floor, your feet will dangle off the seating and be quite uncomfortable to get on & off and even for just sitting there. In that case, you might consider readily available "front row" theater seating because it is specifically made closer to the floor.