Dave, I knew all along a Yamaha arranger wasn't going to satisfy you long, and that its the Korg arrangers that have those features so critically important to you :
TC Helicon VH, larger size keys, optional LH/RH chord recognition, and a cool chord sequencer to boot.
The optional must have $499 PaAS add-on speaker should deliver just what you need as an onstage monitor too.
I know there's a PA3X with your name on it waiting for you somewhere out there, so do yourself a favor and go buy it.
Please post a review for us as well.

Dave, nice group shot of your kids.
Who's 'who' in the pict? I can definitely see the family resemblance.
and have an idea now what you might have looked like with hair.