The Pro,
I second what Idatrod said, let us know if you buy an Ekco or otherwise go software arranger.
I enjoy my Roland and Yamaha: The Roland has some great sounds but little functionality, the Yamaha has great functionality but some of the sounds, especially the piano, are not as good. A software arranger would correct both problems.
Starkeeper
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I play Roland EM20 and Yamaha PSR550