Some comments on the INNOCN 27M2U-D, for anyone following it:
The SDR handling is poor. Looking at a contrast test page (
http://www.lagom.nl/lcd-test/contrast.php ), everything from 28 up looks the same... ie: highlights are crushed. As I'd noted earlier, changing to a custom white balance I was able to restore more detail. Using this page while updating the settings I can see I need to drop R,G, and B down to about 23 in order to see each individual color bar as distinct. You'll then want to increase the brightness. Note, this doesn't re-crush the highlights. Whatever is handling the SDR tone-mapping just doesn't have the right number of bits.
When looking at a gradient test, there's a clear color shift as you move from shadows to normal brightness levels.
Rtings had reported that it lost your settings when changing inputs, then later said it kept them when using HDMI. I can tell you, it doesn't remember settings per input as you'd like/want/expect. On PC, with HDR enabled, my windows are dim, not white, and the mouse cursor is glowing pure bright white. It's idiotic. So I want to keep the PC in SDR state. Surely, I can have one input set to HDR and another to SDR, right? No. When switching between HDMI2 (Mac where I want HDR) and HDMI1 (PC where I want SDR), it leaves HDR enabled. Turning it off causes all the non-HDR settings values reset, so I have to manually choose to use my user white balance again to not crush the highlights... thankfully those settings remained, it just wasn't set to use them. This will make switching inputs an annoying chore.
These issues could, hopefully, be updated via some sort of firmware update, but as it is now... It's far from ideal. I do not recommend.