Since Yamaha came up with the replacement (upgrade) for the Tyros 2, which is the newest Tyros 3, I wonder if anyone has any clue about the replacement for the S900 as well. Although I'm very happy with my S900, I believe its successor will come up with some good and improved features as the comparison between the Tyros 2 and Tyros 3. Any comments is appreciated. Regards, Telmo.