We replaced the original sofa with a twin bed (mattresses and frame, no headboard) which serves as a daybed/couch/spare bed. Nice quilt/covering, several pillows and we have a much more versatile and comfortable piece of furniture which actually gets used. Perfect for curling up with a book. It weighs a LOT less than the sofa sleeper did. That sofa was so uncomfortable our dog was the only member of the family who used it.
Guess my point is, you have all sorts of options.
