Hi,
no, I wouldn't drop my SD1 for a 76 note Tyros.. I wouldn't even drop my PSR1500 for one.
I'd definately drop the psr for an arranger module version though.

best wishes
Rikki
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best wishes
Rikki 🧸

SX900, P121 Piano, Band in a Box 2020
V Arranger/Ketron SD2