What's currently "the best" headphones on the market for mixing?

I'm not too in the loop for headphones in music production so just wondering what are people's favourites at the moment.

I enjoy the Audio Technica ATH-M50x for writing and playing around but wouldn't really use them for mixing, they make everything sound good.

I have the Beyerdynamic DT990 open ear headphones too but am not the best at mixing with them for some reason, could never really grasp them.

Just wondering if there is some new stuff out there that's solid

Edit: are the beyerdynamic DT-1990 Pro 250 Ohms worth it? I don't mind the cost but would something like the Audeze LCD-X be a big step up?

Edit again: Some of the lower range Audeze headphones seem to be the play, some other brands that seem good are Hifiman, Moondrop and Focal

Last edit: I bought a set of MM100s at a good price, hopefully they’re good. It was toss up between them and the NDH30s, but I went with the 100s