I misread the subject also. I thought it said favorites, so I didn't list nearly all the arrangers I've had. Let's see:
PSR70, PSR6100, PSR6300 (I think), PSR500, PSR510, PSR620, PSR740, PSR8000, PSR9000, PSR2000, PSR2100, Tyros.
Also: Technics KN800, KN1000, KN2000, KN5000
Korg PA80, Roland G800, Solton X1.
Might have missed something but that's most of them.
DonM