How about enlightening us as to how you define a professional keyboard. Especially when take into consideration there are a lot of us on this forum who make a good living as professional entertainers and musicians, and use the PSR and Tyros series of keyboard to do so. Keep in mind that the vast majority of piano players are also home players, and I suspect that applies to the vast majority of all instrument purchases are made by home players. So, in reality, IMO, there is no such thing as a PRO arranger keyboard - ALL instruments are PRO instruments when played and used by professionals.

Good luck,

Gary