Thank you very much indeed!
Well, it is obvious that Pa900's vocal processing is nothing like Pa3x. I had some doubts and hopes, but I don't think is really up to the standard for using it live. Jus too bad, as a better harmonizer will have been the cherry on the cake for such a great instrument.
That being the case, I wonder how much do I need the other functions that sets Pa600 and Pa900 apart. I might end up with a Pa600 and a proper vocalist, as some other forumists already have.
Thank you UD, much apreciated!