My current piano (New York Steinway A, mfd. 1900) and I are not getting along as well as we used to. Seems like it's time for a change...
Have you also considered a complete acoustic restauration of your Steinway instead? If you let repair your soundboard, new strings, new tuning nails, new action, new intonation, you probably get that for the same price. BUUUUT: then you can expect to get a very high quality piano with a beautiful sound and action.
I got the opportunity to play on a 100 year old Steinway B, acoustically restaured that way. That sounded great, and the Renner action is just the best what is available today. The Kawai's action is, if I remember well, heavier, tenacious, and sorry, it simply cannot beat that Steinway action (manufacturer: Renner).
So I made the same thing on my 75 year old Steinway O, complete acoustic restauration. In my opinion , that was really the best thing I could do. I never would trade that for a new Kawai, never!
In my opinion, nothing can beat old vintage wood combined with new strings and new action. I prefer that slightly warmer sound, also more sonor sound, but also clear Steinway sound you get that way before a brand new piano sound. But is of course all a matter of taste.