No brand loyalty whatsoever. Anything that does exactly what I want it to do will be whatever I want to use. I've got keyboards by Yamaha, Roland, Korg, Kurzweil, Ensoniq, and have used most others at one time or another.
They are simply tools... Make a better mousetrap, and I won't worry about the logo on the case!
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An arranger is just a tool. What matters is what you build with it..!