We try to buy quality furniture from local merchants, if we can find the item to fit.....i.e. we replaced the queen sleeper with 2 leather lazyboy recliners, and found a tv stand at best buy and mounted a 37" flat screen, added blue ray and surround.....
Over the years and 8 RV's we never found an rv with comfortable stock rv furnishings.....jmho.
I have just bought a sofa bed for my rv. It is a tri-fold and comes apart nicely to fit into our space. It was pretty easy to install - even fit in our slide out space. Getting it delivered through Amazon was easy too
I just went to local thrift shops to find a couch that would fit, both size and color. Found a very nice couch that looks brand new. Since it's in one of the slideout sections of my travel trailer I wanted to make sure it was not too heavy as well. I think I paid less than $300 for it.