RV furniture is all Trash both in construction and materials used. Some Class A have more quality but generally residential construction.
Last year we removed our stock couch out of our 2017 Bounder 35K we used Stanton Furniture who manufactures in Oregon but has dealers nation wide. they specialize in made to order couches whereas you can chose from 100 different fabrics or provide your own. to keep everything looking factory we ordered the stock fabric from Fleetwood and had them (stanton) install on the new theater seats we ordered. Cost was $1200 for a quality US made electric theater seating with my own fabric. They also have seating in just about every width. The new seating was more comfortable than anything we had in our home.
http://www.stantonsofas.com/
If you can avoid it DO NOT BUY RV SEATING buy residential
Also note that all couches that are reclining the seat backs are removable, in fact they are usually shipped with the seat backs off. This makes it easy to get through your doors and then attached in place.
The Stanton seating I was also able to screw the base down to the floor of the slide so it would not move while going down the road. Also note these are Wall Huggers. They also offer recliners so you could match all the fabrics
Here is the couch we installed
