I recently went through the same process of upgrading my display setup for gaming and productivity, so I totally get where you're coming from. After doing quite a bit of research and testing, I settled on a few key considerations that I think might help you as well.
Firstly, since you're looking for 4K resolution, you'll want a monitor that has good color accuracy and a fast refresh rate, especially for gaming. From my experience, models like the LG 27GN950 or Samsung Odyssey G7 are great options. The LG 27GN950, for instance, offers excellent color accuracy and a 144Hz refresh rate, making it fantastic for visually demanding games and creative work. It's a bit on the pricier side, but I found investing in a high-quality display pays off in the long run.
Another model that's caught my attention is the Dell Ultrasharp U2720Q. It's not just for gaming but also excels in productivity tasks with its accurate color reproduction and USB-C connectivity, which is a huge plus for reducing cable clutter if your setup supports it.
Considering ergonomic features, both these monitors come with adjustable stands and VESA mount compatibility, allowing you to customize the setup to your liking. Also, eye-care technologies like blue light filtering and flicker-free screens are becoming more common, so it's worth checking if the models have those features if you spend long hours in front of the screen.
I suggest taking a look at reviews specifically focusing on these aspects. Websites like Rtings or Trusted Reviews provide detailed evaluations of different models which might give you more perspective based on metrics that are important to you.
One piece of advice is to physically check out the monitors at a store, if possible. Seeing the display in person can make a difference in your decision-making process.
Have you considered what size of screen would best suit your needs? Sometimes the larger screens, while impressive, might not fit well with your desk setup if you don't have the necessary space. It’s just something to keep in mind while narrowing down your choices. If you've got any more specific questions or need insight into other models, feel free to ask!