There's always the Casio PX-200...88 keys, 128 note polyphony...MIDI in/out.

Casio weighs 12 kg...or 26.4 lbs, still pretty lightweight for 88 notes.

It also has Line out R L/Mono standard jacks.

Great deal...cool piano.

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