Mark this is my opinion, not for everybody. I buy the best keyboard at the best price, if I don't I will be left with "If I only" If the Pa4x is too pricy I will buy a used one.

The price of the best Korg keyboard, Pa4x, is paid once, after that trading your keyboard for the new model is easy. I did that with Technics, from the Kn2000 to the Kn7000. The same with korg, the Pa800 to the Pa4z. AND if you stay wit the same brand keyboard you compound the learning each time you up grade.

John C.