Mystic Jammer, welcome to the forum. Your post sounds similar to many others including myself who have talked about the keybed of the PSR series arrangers. For me it's come full circle. I started with a PSR 3000, then in the course of a few years I went to the Tyros2, then the Roland G70, Korg PA800, Korg Pa2xPro and now the S910 ( I still have the Pa2xPro).

I've been thru the same regarding keybed, I never liked the PSR series keybed because I played piano most of my life. I use to actually take 2 keyboards to a gig with me, an 88 key Casio Privia PXR410 and the PSR 3000. I think that lasted for all of 2 months and thought I gotta be out of my mind doing all that extra work carrying an 88 note controller for the PSR 3000. From my point of view the perfect keyboard arranger would be the guts of a Yamaha Clavinova CVP 509 in a portable form factor. I think we can forget about seeing one of those, so I work what works best for me, right now the S910 and a Korg Pa2xPro. ( never take both to same gig). 95% of what I'm doing is assisted living/senior/nursing home type gigs. Most of the facilities I visit I have nice piano sitting in the same room where I play, so it all works out.....play a few instrumentals at the piano half way thru the hour long the rest of the time play/sing using the s910 .