The most important factor in my mind in choosing a keyboard is not the number of voices but the true polyphony, and this is one area where Yamaha has kept us in the dark regarding the Tyros. When using the Organ Flutes on other Yamaha instruments such as the 9000Pro, the polyphony drops dramatically due to the use of layered voices. This can be a problem when using the organ live with styles or midi backing... so much so that Yamaha recommends the use of the XG expansion board in the 9kPro if you plan on using the organ flutes with accompaniment. No such option with the Tyros. Does the added memory dedicated to the voices in the Tyros mean that organ flutes no longer eat up the polyphony? That's the 96MB question...