Thanks Micco for your very comprehensive review of these three instruments, it came at just the right time, I have recently been thinking of ugrading my PSR9000 for the 9000pro. I have also had my PSR9000 for about a year and like you I love it to bits,
I don't think the 9000PRO has enough additional sounds/features to justify me spending more of my hard earned cash.
Yesterday I recorded some MP3'S of my PSR9000's factory demos and also downloaded the 9000pro demo's, I then played them both through the same set of speakers and there seemed to be very little difference in the overall sound of both keyboards, obviously where the demo included a piano the 9000PRO
was a hands down winner, but with a little tweaking I have managed to get a very nice piano on the PSR9000 , so I certainly would'nt upgrade for an improved piano sound. As you say the PSR9000 speakers are really superb, probably the best ever on a portable keyboard, I'm sure I would have to spend a considerable amount of money to get a comparable external speaker system for the 9000PRO, so this is another downside.

If the 9000PRO had the ability to load industry standard "AKAI" samples, had more flash memory for custom styles, then maybe I would upgrade, but as it stands I will wait for Yamaha's next offering PSR10000, hopefully this will have the features I mention, imagine having access to the "AKAI" library of sounds, you would possibly never have to upgrade again, perhaps this why Yamaha have left off this feature???.

Paul.