These days I received a proposal to replace my Yamaha MO8 by a Yamaha S80. My MO is well and stained with many risks. By contrast, the S80 is new, because the owner ordered a new housing, knobs and buttons. It’s beautiful really. I found interesting the idea of exchange, because I can expand the S80 with the expansions PLG-150. What do you think of this exchange. Worth??