The entire point is compromise, Ian...

You CAN'T play a full piano part on a 61, and you CAN'T play good organ parts on an 88...

Now, I don't know about you, but just about every single job I play involves BOTH sounds. I can't justify taking two keyboards when one can do both tasks adequately. Hence the 76.

And I'm sorry, but every pro in my area that doesn't play primarily piano on an 88 uses a 76. Yamaha recognize this fact in their 'pro' line, the MotifXS. Sad they don't recognize it on their arranger line.

Oops! Is it Groundhog Day again...?
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An arranger is just a tool. What matters is what you build with it..!