As an additional opinion, I find the SK-1 keybed to be good, It is semi-weighted and waterfall. It is as good as my Pa4x, but a bit longer throw. I just got my SD40 module, and they go together very well.
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pa4X 76 ,SX900, Audya 76,Yamaha S970 , vArranger, Hammond SK1, Ketron SD40, Centerpoint Space Station, Bose compact