Depends on how much money you're willing to spend. Are you thinking of Yamaha only? I ask this because your question is in the Yamaha section.

I don't know much at all about the PSR arrangers. Maybe one of those will be perfect for you.

You could start with deciding how many keys you'll need. 61? 76? 88?

Can you be more specific as to how your music will be presented?

Best wishes
<><
Bob