Well what do you know... I lowered my main monitor by about 5 cm (or 2 inches for the imperial subjects out there) and it doesn't even feel low, just normal. Looks like I really was straining to look at a monitor set too high for me, let's see if this is an improvement. I'm already feeling more relaxed as my chin gets tucked closer to my neck.
* For perspective, my main monitor is a 50” monitor across the room so a 5 cm difference in height is not as drastic as it would be for a desktop monitor.