Strideplayer
Just a few years ago we did a blind test of the piano voice here on the forum, on a variety of Yamaha arrangers. I produced a midi and it was then played and recorded on several different yamaha keyboards, including Genos, PSR, CVP, Tyros 4. Then the results posted here. We also had a VST sample. People were asked to pick the best one. Most people admitted they could hardly tell the difference and the choices of 'best' were basically random. I personally thought the VST sample was definitely a little better, but it was truly marginal, and the bottom line was that to my ear, all of the samples sounded reasonably like a real piano. Yes there were small differences to very discerning listeners, but then there are big differences among real pianos anyway.
As a piano player myself, I think the complaints about lack of 'body' in the piano voices on these arrangers is well exaggerated, and I would go as far as to say that they seldom come from people who are good piano players. They relate more to the way people who are not experienced piano players play piano voices on arrangers.
BUT, piano players will complain and rightly so about poor keyboard feel. None of these arrangers feel anything like a real piano keyboard, even a bad one, and as a piano player that ultimately does affect how you can make it sound, and the general satisfaction from playing.
The original sample was recorded on a CVP, which has a decent piano like keyboard, so that poor keyboard feel was removed from the equation, and we were truly only comparing voices.
Unfortunately that full thread has gone now, so I cannot post a link to it. But I include one of these samples below that I still had, so you can judge for yourself. I am not sure which one it was, but it doesn't really matter because to all intents and purpose, they all sounded so very similar in quality. So you can use it to set your expectation for the Genos. Just make sure you listen through good speakers or headphones to get the best result.
You may want to think about driving the Genos voice from a decent controller keyboard to get better feel, and still have all the other Genos functionality. Even the Casio digital at just $300 is way better keyboard feel than any of the arrangers, except maybe the CVP or DGX.
https://app.box.com/s/b11mcgsvw2f0owmm4ci8b4ke4s79ov6zMike
BTW, if you are a piano player, don't ignore the DGX, it gives about 90% of the arranger functions and voices you are likely to need and has a fully weighted 88 keyboard, and sounds very good. not a bad compromise, and a lot cheaper.