Squeak,
If you haven't looked here already, it's a good place to start.
http://reviews.harmony-central.com/reviews/Keyboard+And+MIDI/product/Korg/PA-50/10/1 I haven't played a Korg arranger, except for the i3 many years ago...they don't carry the newer ones in my area.
Ian
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Yamaha Tyros4, Yamaha MS-60S Powered Monitors(2), Yamaha CS-01, Yamaha TQ-5, Yamaha PSR-S775.