IMHO Thor Four Winds has the best build quality inside. REAL oak cabinet doors thru out and real hard wood for the drawers slides etc. No matter what price range you are looking at.
The only thing I found was when I thought my couch/bed was shot when it wouldn't stay perfectly upright. I called mobile repair to replace the couch and he came out and said "I'll show you why it won't stay up."
Real wood is the frame but real thin pieces that had shredded from use. My mobile guy pulled that all out and replaced the whole frame with 2x4's and reattached it. Couch is like brand new again and actually sits better than when new.