Once more an impressive contribution here Sergey,I could well imagine you writing scores for movies , imagine having professional tools in your hands like top of the line arrangers and workstations.....Perhaps you should start looking for a job elsewhere
As you have pointed out to me there is a clear predilection for minor chords in Russian music, much more so anyway than in Western popmusic, perhaps one of the reasons it more resembles a filmscore ?
Also worth noticing how once again you have favoured the 15 year old Yamaha over the 950 which in itself is already dated these days. Remarkably how some of us are reaching out to older boards again. Donny of course with the Tyros 2 and myself with adding the old Korg PA50 to my ketron sd7....
Nonetheless I stay with my mantra that if possible it is better to have two keyboards ( either arranger or workstation) of different brands as they complement one another. Another advice I continue to give to folks wanting to buy an arranger or workstation is that if you are an instrumentalist and do not sing your first choice should be imho a Yamaha. People like you as a matter of fact deserve to have a GEnos !!!
If however you are a singer and want to have a band accompanying you the choices become wider and more complex.But then again all the top arrangers from Yamaha,Korg and Ketron will foot the bill, and even the Roland E-A7 or so I am given to understand....
Thank you for sharing and it is good to have you here on the forum with all these "bloody yanks "

kind regards,
John