The best digital piano is one that can grow with a musicianas they progress. When a pianist's skill level rises, they require a keyboardaction built for more serious playing. The Arius YDP-163 features Graded Hammer3 keyboard action with three sensors and synthetic ivory keytops, giving theperformer a tactile surface with a response reminiscent of some of the finestpianos throughout history. The Pure CF Engine on the YDP-163 more expressivelydelivers the Yamaha CFIIIS concert grand piano tone for the more experiencedplayer with a more powerful 20W stereo amplifier. With 192 note polyphony, manyof the most complex piano compositions can be played without any dropped notes,and the sustained notes ring through faithfully. The YDP-163 has all of the conveniencesof an electric piano without sacrificing the performance of an acoustic piano.