I just bought a Korg PS60 to go with my KMA. I now have a light rig that will hold it's own anywhere, connected to my Bose Compact.
The PS60 is a performance KB, and good for fast intrument changes and based on new technology than the KMA. It is also highly editable.
Bernie
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pa4X 76 ,SX900, Audya 76,Yamaha S970 , vArranger, Hammond SK1, Ketron SD40, Centerpoint Space Station, Bose compact