I actually use the right hand voices a lot, and even use a few saxes, but never wasn't happy with the voices. I heard the PSR-1500, though, and if I had that, I'd upgrade. The recording would be a nice feature, but if I need to record, I can use my computer. And the SA voices seemed nice, but mainly focused on guitars.
But again, I never used it... so that's why I am asking your opinions.