I have sympathy because it's the kind of problem you probably cannot pick up in the shop, or quickly. You need time in your home, with your HDMI or D-Link, your ambient lighting, your settings.
I begin to feel like we may need the equivalent of what audio shops used to have: a listening room with normal furniture and a big switch to test different things, but for eyes not ears.
I only buy s/h Dell monitors 3-5 years behind bleeding edge because I am a cheapskate with old eyes, who can't see past the dust on my glasses anyway. But I genuinely can relate to this problem. It would suck to invest in the best you can afford and find it's not doing what the dollars expect for you.
> I begin to feel like we may need the equivalent of what audio shops used to have: a listening room with normal furniture and a big switch to test different things, but for eyes not ears.
It doesn’t even need this. The old way of buying stuff was from a shop. With big ticket items you build a relationship with staff and their recommendations helped. Now it’s all shipped or bought from faceless big box stores.