Mark, the Pa4x is better in many ways. Fill buttons are one of them. But, the Pa1000 is not Korg’s flag ship model. Also, there is a big difference in price.
The Pa1000 will do a good job, but never as good as the pa4x. But it weighs less. A pa5x might be something to wait for???
John C.
aaaaaah, decisions, decisions – (smile)