We just took delivery of our new LazyBoy furniture. We replaced the existing recliners and changed out the air bed sofa with a duel reclining Love seat in our 2013 Bighorn 3685RL. The new furniture went in with no problem. Sorry there is so much sun in the pic but you'll get the idea. If you are in the position of putting the recliners in the rear of the coach and are looking for replacements that will fit, look at LazyBoy Pinnacle Series. They fit in there very well with the slides closed and pose no clearance issues.
The old was removed without too much problem. The chairs went out in one piece and the sofa bed went out standing on end once the feet were removed to gain the needed clearance at the door.
Our sofa was not attached to the floor. This new ensemble also gave us a more room at the dining room table. All and all this was a win/win!