Lee, for me, this has never been a problem because I always used my right hand to switch voices, therefore, I had to lift my hands off the keys in order to select the next voice. The transitional problem has existed since the PSR-2000 came out so many, many years ago and has never been addressed, though there have been several posts about the problem on many forums that Yamaha monitors. Not sure why they never bothered to tackle the problem, though.

I purchased the PSR-500 and PSR-5700 many, many years ago and used them double stacked on a monster stand that DonM still uses today. What enticed me to Yamaha was the styles and right hand sounds. I have also owned a Korg M1, Roland 800, and a few other brands, but always came back to Yamaha for those wonderful styles and sounds.

None of the operating systems thrilled me, but over the years, I dedicated a lot of time to learning every aspect of Yamaha's OS so I could better utilize the many features available for live performers.

Good luck on whatever you decide upon,

Gary