Can confirm latex foam is good stuff, I have a latex foam mattresses that has lasted decades. Not all foam is the same tho, so maybe look into what kind of foam is in whichever couch you consider. Some seem to use memory foam. If you look at one of those, make sure you know what your getting into and whether you like that. I have no experience or opinion on memory foam myself but one person I know regrets their memory foam mattress. I think it has to do with heat and feeling held in place when the foam warms up and they sink in.