Murat
The problem here lies in the definition of 'superb'. The problem is that fully weighted, simulated hammer action keyboards are both heavy and expensive. It becomes a trade off in cost and portability. Another issue is that because they are expensive, the ones with better keyboards always tend to include a load of complicated features that might not be of interest.
I had a simple dumb semi weighted 88 key controller for a while and I found the action OK, and a decent cost/weight trade off, while nowhere near the feel of an excellent acoustic grand piano. It was an improvement over the pSR alone, but the problem for me was the PSR piano sound. So I later changed the dumb controller for a Yamaha stage piano which I used for a few years as a controller. I really liked it, because the feel was reasonable and I now also had the much improved piano sound. And the cost /weight trade off was also fair. The action was better than the controller, and better than the PSR or Genos, but again, not at the level of a fully weighted good hammer action. Its a trade off, our and simple. Of course I could get digital stage pianos with much better action, but then comes the cost and weight issue.
I don't think that anyone can make these decisions for you. You have to try them yourself and see what matters the most in making the trade off between cost/weight/keyboard feel/ operating simplicity.
On a wider topic, I know you have asked about using one arranger to control another - the Genos and Korg. I think that using an arranger as a controller for another arranger is overcomplicated, and not something I would do myself. The arrangers are very similar, so there isn't too much gain from having both, but they have different operating systems which seems an unnecessary complication to deal with in live playing for the relatively small gain in additional features or sound. And neither are 88 key, which for a piano player seems like the biggest attraction of a controller. But this depends on your personal interests. I have little interest in the ability to 'play around' expansively with sound, effects, or complicated features. Although I have an extensive technical background, when I sit down to play I want the technical part to get in the way of making music as little as possible. The problem with the digital piano/ arranger set up is that the piano sound could not be recorded through the PSR, so I then added a recording studio, mixers and separate sound systems. It became a real workshop.
I ultimately decided to go the route of the CVP, which rolls together the arranger and the and high level digital piano into one simple instrument - no wires everywhere, or multiple operating systems, so that shows my bias. It also kept my wife happy because it looks so much better than the 'workshop' look of my previous set up. But then we all want different things.
Hope this helps.
Mike