Well, it sounds to me like any keyboard can be a "pro" keyboard if it doesn't have an arranger and you have a live band backing you up when you play. Sounds very narrow minded and old fashion to me! Seems like some people refuse to enter the 21st Century. Of course, there have always been people who refuse to recognize or utilize new technology that infringes on their egos. I suppose some of them even consider themselves musicians. Like the dinosaurs, these old, set-in-their-ways people will eventually become extinct for refusing to adapt. IMHO, I think everyone who enjoys what they are playing and who's audience enjoys what they hear, is a "pro" and so is their keyboard, arranger or not.

Peter