A heavy keyboard is a pain (I should know! )... so is a wimpy keybed. So is an unintuitive OS. So is a bland, non-dynamic sound.

Only the weight issue, though, is something that does NOT effect you when you play. Once it is on the stand, it HAS no weight! Everything else makes a difference, though...

Just a thought.
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An arranger is just a tool. What matters is what you build with it..!