A lot of money (can get 2 900s) but the keybed itself is worth keeping. It is the best 76 I have played.
Why I will keep:
1. Motorized screen (neck surgeries) is a blessing
2. Speaker bar (optional to take or not) is incredible in combination w/Nano
3. Keybed fabulous
4. More controls on panel
5. Vocal harmonizer
6. EC-5 Pedal (cannot believe how this would be missed since I used it extensively with my past 800).
7. Quality build and beauty
Just a few for starts. 800 stick didn't match up but they have the software work-a-round. I'm just starting over and redoing my songs anyway. Might never play out, depends on how I think I sound
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Those are the main things.