We have replaced furniture twice in two separate RVs. The first because of delamination and the second because of just plain uncomfortable furniture. Each time we took careful measurements and went to a normal furniture store, made the purchase and made sure the store employees would get the old furniture out and new furniture in for us. In both cases the store-bought furniture far exceeded the RV furniture in comfort and durability/wear.
Second the Shiflets. If you want the best, go to Lambright in Shipshewana, IN. They are among the best if not the best in the industry. Mennonite craftsmanship and materials that will probably outlast the RV. Not cheap but as with most things, you get what you pay for.