Acoustic Piano sample preferences are so down to very personal taste, but we all
at least seem to agree for once on this one. Not my preferred piano voice either.
Then again, I've got a 7' Steinway Grand Piano, so a bit biased.

PS: I often like to 'layer' the Concert Grand with the Live! Grand.
Yep, the
Live! Grand Piano is my "go to" piano...having played the
other brand arrangers, with the exception of the Korg, it pretty much blows away anything else by a wide margin, in my opinion, of course.
I wonder if there is a Korg synth/workstation or digital piano that has the same piano sound(s) as the TOTL PA-series?
That way, I could at least get an idea of what their arranger piano sounds like.
Ian
PS...I find the
Live! Grand Piano sounds great on it's own, without layering. The
SA Concert Grand was disappointing, although it is supposed to be improved...not by much, to my ears at least.