I'm not sure the piano sounds will be better than what you have in the ES110 if used just for that. It doesn't support damper resonance and such if I'm not mistaken. However it's a fine synth/workstation on its own and to a certain degree I'm sorry I sold my MODX6 recently because it was a great keyboard for the rehearsals and jams I used to play in. It's very lightweight, very compact, yet contained ridiculously good sounds and features.
