Danny, so far the few owners of a Tyros4 are very happy with the upgrade from a Tyros3, and most of these do not use the Vocal Harmonizer.

I'm looking at it from a gigging perspective, hence the preference for PSR, which I find perfect for my needs.

50 new styles, plus re-voiced older ones, plus the ability to use all the styles from your Tyros3 is a decent amount of styles, plus you have all the styles from the older series, like PSR-9000Pro which have been converted to work in Tyros, and are readily available on PSR Tutorial.

So, you're not really losing a Tyros3 in as much as you are gaining all it's features, plus the ones on the Tyros4.

Good luck with your decision, and take your time with it...let the frenzy and hype die down first.

Ian