Hello Luis, I'm also a latin keyboardist and VERY happy Ketron user that had a duet with a female singer (until I move from Mexico to USA 5 months ago). Very much depends of the type of style you play/sing, etc......I had other keyboards like Yamaha, Roland VA7, etc....like I said, in my case, until I got my first Ketron X1 HD, then the SD1, since that point, there is no way I would settle for anything but Ketron........patterns/styles, features design to/for performance and the most real sounds that you ever heard.
I know that you have heard marketing terms from other manufacturers like "megasounds, etc..." , but, only a few of this good sounds are into the keyboards combined with other technologies of sound generation , the issue is that Ketron is being making for years this very high quality sounds for ALL the voices for the instruments they make.....I'm almost 99.99% positive that if you test this instrument (SD1), you'l prefer it. Good luck.

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mdorantes