It's not so complicated. OP asks for best action for playing VSTs in a board under 700€, new or used. Of course it's subjective, but a thread like this can provide a shortlist of likely candidates. New, the leading contenders are probably Kawai ES110, Korg D1, Roland FP10.
There we go, now we're getting somewhere! I have been demoing the SL-88 Grand from Studio Logic and I think it feels pretty damn good. I will say that. perhaps that might be the best bang for the buck type of controller. I would like to try the three mentioned above. I do not know how the different brands feel. I can say this
In the past I have had M-audio 88 key hammer (the old version and it was terrible)
Arturia 88 Mk1 (Also bad)
Studiologic Numa (Felt good, but it broke with a firmware update)
Studiologic Sl 73, 88 (Felt ok, but too stiff and smooth on the keys, not enough texture) For the price though! A great Option
Akai MPK 88 (Really stiff, but an interesting controller with lots of features)
Studiologic sl88 Grand is a few steps above the rest of these for sure!
That is pretty much all the full weighted controllers I have had. As you can see I am more producer based than pianist based, but I have gotten better at piano over the years and would like to take it more serious, albeit the questions