I'm not ordering one just yet either, but there is no reason why the eKo could not be an arranger keyboard with the right software. It has the potential to be nearly any kind of keyboard you want. I'm looking down the road at what might take the place of my 9000 Pro in the future, and considering the experiences I and others have had with (non)support from Yamaha with the 9kPro and this "will there or won't there be a Tyros Pro?" debate, in addition to the faltering with new arrangers from most of the other manufacturers, I'm ready to go in a new direction altogether. I'm already checking out softsynths and soft-arranger programs that could work with the eKo. Nothing wrong with keeping an open eye and mind at least.
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Jim Eshleman