So I found various threads discussing NU1[x] 'loud note' problem and the extent to which new software etc. has softened it. E.g. http://forum.pianoworld.com/ubbthre...loud-note-problem-with-firmware-2-1.html
As I read it, people suggest this comes because the sensors scan the key movement rather than the hammer—so would there be similar problems on some acoustics rigged to be a MIDI controllers?—but that the reason the key comes down more quickly because the hammer is not in the way, and therefore of course in actuality an analogous upright hammer should not be able to be triggered to hit the strings, but in the NU1[x] the key is still sensed, but super-loud. (It has something to do with upright actions.)
But the way this manifests is partly due to the software, that simply registers the jarringly loud MIDI note as loud instead of silencing it as a likely error, or something. (And I agree I would prefer the note from this hardware error to go silent rather than unusually loud.)
How much of a problem should this be on a new NU1x? Name VSTs with a workaround?
What should I test to have an idea in advance what nuisances certain—i.e. how do I set off these problems when testing the instrument?
(You could also advise on the opposite, how to minimize the problems.)
Now I will expand the question:
In addition to looking at a Yamaha NU1x, I may consider a Kawai CA 78 or 79, or a Roland 406, or something slightly lower tier from these brands.
So what should I be looking out for bad or good from any of those models, also?
Reference notes: in practicing, on digitals or otherwise, I am attracted to practicing in some sort of attempt at 'virtuosity', but my deeper focus would be on getting a pretty tone. (Perhaps also I should be developing more dynamic dynamics.) How does this change what I should be looking for when trying the pianos?