Given Ketron's price premium when it comes to arrangers, I wouldn't expect them to be very competitive price-wise here in the US... not to mention an almost non-existent dealership network.

But if the thought of matching PA and keyboard logos gets your aesthetic juices flowing, and price is unimportant, I can see them being just the ticket...
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An arranger is just a tool. What matters is what you build with it..!