Also, I just had a look at the price list... so, my 34" 21:9 monitor is about 1/3 of the price of your new video card

. I have bought it almost five years ago, and now I consider this size as
the starting point 
... if there are enough room for it, of course.
But, 16:9 is still much more versatile aspect ratio —
lots of modern games still don’t have the
Ultrawide support. So, 55" TV (it has exactly the same width as the table where my trucksim monitor stands

) would be my choice if I didn’t have my current setup and wanted to follow the typical
YouTube sim gamer. In general, the current video card prices make me fear the expensive monitors much less than years ago when I was buying what I have now.