Tom,

Before I bought my Ketron X4 with harmonizer, I used to play live with the Digitech Vocalist Workstation EX: http://www.digitech.com/products/vws.htm It has several presets and vocalizer modes. The sound quality is probably better than the internal solton vocalizer, but for me the no-wires internal vocalizer is a big advantage. That's why I don't use the Digitech anymore. I have it on a portuguese E-Bay for half the price it costed new. In case you are interested, Tom, please e-mail me directly.

-- José.