The G70 has a great piano sound...less compressed that of the Yamaha Tyros2 and definitely superior to the Korg PA series.

It's surely worth a listen, but also make sure the arranger features meet your approval as well.

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