The Roland E-50 is a fine instrument, I've played one and it's a got a great sound and styles are excellent...I can't speak about the Korg PA-500 as we don't get them in my area.

What about the Yamaha PSR-S700...is that over your price limit?

The Yamaha MMO6 is not an arranger.

Ian
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Yamaha Tyros4, Yamaha MS-60S Powered Monitors(2), Yamaha CS-01, Yamaha TQ-5, Yamaha PSR-S775.