I've heard about Innolux being a better 4k IPS panel, but U28R55 have way too wide gamut (and no sRGB mode) and I cannot tolerate oversaturated colors. pcmonitors.info has some reviews of Acers and other monitors based on this panel, but those that have low minimal brightness I cannot find on sale. My preffered brightness is 60 nits, and most monitors have 0% around this point. I was thinking about buying Benq 2880U, but hesitate due to not knowing the min brightness and having bad experience with Benq PD2700u (terible anti-grain coating, very grainy). There are many cheaper 28 inchers on sale but they all are crippled one way or another, and those that are good - are not sold anymore.