I have done a lot of work on the SD7, and used it for three weekends. It sounds fantastic, the screen is great, most all bugs worked out now...
Still, I'm not sure if it's for me at this point. I may opt to use the Korg again. I have done SO much work on it, Songbook, edited styles, tweaked and saved sounds...
The Ketron will do all of this too, but I don't think I want to devote all that time again.
We'll see. . .
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DonM