Unless things have changed in the Tyros5, from what I've been reading and seeing on SZ, the Korg PA-series (PA-3x, PA-900, PA-600) has the most extensive on-board sequencer editing abilities.

Perhaps someone with experience with Korg's sequencer can add more information.

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