Tom,

JFYI, as an alternative to the purchase of a synth module, Ketron sells addicional soundbanks that you can load in RAM or in a flash card. It's a rather inexpensive solution, and among the new voices, there are some good pianos and at least a very good nylon guitar. I will put an mp3 demo of the X4 pianos available online when The Pro/Simon make their midi files available to us.

-- José.