I'll probably be flamed for saying this. I think Roland has the technical expertise to totally dominate Yamaha, BUT are unwilling to put money into their products. The EM series have many sounds/tones that are better then Yamaha, but got left behind because they don't have the functionality of the Yamaha's. No DSP for one thing. Put some money into R&D to develop 50 outstanding sounds/tones, not a re-hash of 3000 ho-hum sounds. The EM55 should have come out with a flute that would have blown away Yamaha's "Sweet flute" and "Classic flute", not. An improved piano, not. They lost out on a potential sale. I would have upgraded from my EM20 to an EM55. You lose Roland. You gotta try harder. Come on Roland, you can do this.
Starkeeper
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I play Roland EM20 and Yamaha PSR550