Just want to follow up on this.
I listened carefully to all the advice from folks in this forum and elsewhere.
I listened to everyone who told me I should get the "uber" monitor.
I placed faith in those who told me I would definitely notice the difference.
I tried to think of my long term interests.
And I did ultimately get my new monitor.
FWIW... to all those who are considering the same options (ROG vs. Predator):
1) The ASUS won the day, for issues and reasons that don't really matter (ex. joystick was easy to use, but I only used it for initial config, and now doesn't matter).
2) The picture quality is great, brightness superb, couldn't ask for a better monitor in terms of vibrance and clarity.
3) There is significant light bleed, but you will never, ever notice it when there is anything on the screen (unless you turn off all the lights, and are staring at a black screen, which I generally don't do for long periods of time.. or ever).
4) I can now run at faster than 60fps with my 1070 and g-sync... and ultimately it really looks no different than 40fps.
5) I also can see everything at 2K resolution, which IS a noticeable improvement. (ex. there is an intricate pattern of lines in the oval drone-spawning dreadnaughts with the blue tops!)
I'm very happy with the monitor in a general way, and don't think my particular unit is a special case in any sort of "monitor lottery."
I probably just received the same poorly manufactured panel as everyone else.
... so awful that I'm keeping mine without complaint.
I'm really just a normal guy... not a technophile.
This purchase was not crucial to my identity.
And although I haven't ever seen or handled the Predator monitor in real life, I imagine my reaction would be quite similar.
I just play and enjoy... as most people do.
No doubt, if you are reading this, you are someone who is trying to make a choice between the same two monitors
... and given where you are in the purchase process, you probably won't listen to good and honest sense.
... so I will simply suggest that you are more than welcome to pay too much for a monitor that is 2K, IPS, 145hz... with all the "cool" stuff that ultimately won't make any difference in your gaming experience....
Personally, knowing what I now know, I would have probably been equally happy with a good, high resolution non-gamer model with decent resolution and response time.... and then spend the balance that I saved on something else.
(And actually... I really can't vouch for the importance of response time either... the effect of 2 extra nanoseconds is probably negligible and significantly faster than human reaction time anyhow... I'd be the first to honestly admit that I don't do much at the tempo of nanoseconds.)
Someone who i trust told me that there are some really nice and huge BenQ monitors out there, and they are supposed to be quite good in terms of image quality, clarity, blackness, etc.
Second time around, I would probably look in that direction.
Or maybe a really good Viewsonic.
Meh. Who knows...
GL with your purchase.
May it be the monitor of your dreams.
Apparently, my dreams are pretty mundane these days.