What affordable monitors are you using in 2020?

I'm getting back into video after a long time away. Went down the rabbit hole last night researching 27" and 1440 and 4K and am way more confused now. Have a nice older Dell 24" and was set to updgrade to 27 for my Macbook Pro mid2015 - but now not so sure. My eyes are already pretty fatigued so wondering if I should go back to dual 24"/1080. Wondering what other folks are using these days.