On that basis, I would use a Korg Micro and the KN7000. I used nothing but the Korg into my Bose, and had great response.

The week before, I took the KN7000 and Korg Micro. They played well together.

Sure, a PA800 or PA3x might be better, but at what cost ? Certainly more than $499
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pa4X 76 ,SX900, Hammond SK1, Ketron SD40,Ketron Event X Centerpoint Space Station, Bose compact