Bluegrasser, thanks for your awesome thoughts.
 
I dream I'll go to BestBuy and test-try a 55" CURVED 4k (UHD) (with their 'return policy').  I thought about a curved LG OLED NON-4K  ... but realized at 2 ft away the OLED's 1080 pixels would drive me batty.
 
As you may be aware, in X3, during playback the traversing 'Now-line' can get 'jolty' ... but that's probably due to CPU strain.  So, I hope joltiness is not a compounded video issue.  Incidentally (off topic), my motherboards and video cards oft get fried from suspected intensive Sonar use.
 
If the screen causes my head to move too much (and/or too high), I'll just do like you, move the vital stuff to fit to the eyes sweet spot ... down, front, center.
 
Utmost blessings,
P

'Bought from BestBuy:
 
1) the Samsung UHD HU9000 curved Smart T 65" ($3500 on sale)
2) Video Card: Geoforce GTX 9700 ($380)
 
After setting resolution to 4K and 30Hz (60Hz fails) this works exceedingly well for me, 1st day.  I spent 4 hours on my song HeavenSkate!
 
Now I run X3 in ULTRA HIGH RESOLUTION 4k (not 1080p) on this huge monitor.  X3 appears majestic, detailed, and breath-taking ... the best config I've ever had!  All praises to God!
 
Time will tell if things change.  I'll try to remember to post if things change.