I too thought the Fantom x had the best acoustic piano[maybe as good as the first SRX 02 piano board], but the new SRX11 is even better..None of the other guys [Yamaha,Kurz, Ketron and especially Korg] can beat the newest pianos from Roland..Go to RolandUS and listen to the exspansion board demos and see what I mean...and they are responsive...very playable..