Bill,
This is my quick evaluation of those 3 keyboards. http://www.synthzone.com/ubbs/Forum37/HTML/008936.html.
I was so put off by the harshness of the EXR-7 that I did not give it a full test. It is apparently the amplifier/speakers, not the sound engine that is the problem. So I will have to demo it again with headphones. This is extemely poor quality control on Roland's part. How could they do such a stupid thing? This means that it is inferior, right out of the box. This will also reduce its' resale value.
Starkeeper

[This message has been edited by Starkeeper (edited 10-14-2004).]
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I play Roland EM20 and Yamaha PSR550