Only played a p-90....sounded and felt great. Never played a kawai mp8 but it sounds amazing from what I have heard.At moment I midi the korg triton into a studiologic (SL-88) controller, which feels fine. I dont like the acoustic piano sounds on the triton though.Ideally my new setup would be just a great sounding piano, so either a stage piano or a module into my sl-88. I tried the roland p-55 sound canvas recently.....horrible!