Just to share my experience...
Not too long ago I was looking for some keys to use with pianoteq myself. I spend quite some time trying out a lot of different keyboards in the mid price range, among them the Kawai MP6, Roland FP7, as well as the Numa Nero.
Obviously I found that none of these felt anyway near to a real piano (and neither did any of the much more expensive ones) - no surprise of course, but that meant that in the end I was looking just for something that felt comfortable for me, rather than caring too much about imitation of a real piano.
Overall I tended to keys with a rather heavier than lighter touch (though of course a larger grand piano might have a much lighter touch, but that is not the point) But I was not very pleased with the Numa Nero, neither with the keys themselves nor with the actual velocity output or the curve settings/You Play feature (not sure whether a later firmware update would have helped) To be fair, a replacement could probably changed my judgment a bit, since the one I got delivered had at least one issues with the weight of the keys (basically had some lower keys, that took less force to press than higher ones next to them) But I did not ask for a replacement, as I saw little chance that it would change my opinion much and the issue already diminished my faith in overall quality.
Though I had not taken it into closer consideration from the beginning, I then somehow got stuck with the Yamaha CP33 when I was looking around some piano shop again. And it was not primarily because of the lower price, but because it felt better to me than many more expensive alternatives. Of course it was already quite old at that time, but so I already knew that it is a robust and reliable Stagepiano, and bought a used one in the end for around 800€, which also pleased my wallet. The built-in samples were probably never great and are of course not worth mentioning these days (also it has no built-in speakers), but I guess someone who wants to use it with pianoteq anyway couldn't care less... And the keys are still competitive. They are rather heavy (not unpleasant to me) and definitely provide some reasonable dynamic range. Not sure whether it would suit your needs, but might be worth considering as a cheaper alternative.
Anyway, this is of course just my very subjective view, and I wouldn't even call myself an experienced player, nor do I know whether the market changed in the last years. But then all you can expect from other people, are some hints on what to look at, then you have to try it yourself anyway.