ATH-M50x are good, but not as good as I expected. First of all after about 3-4 months that hinge named earlier did break on mine. On the right side and I had to make some DIY repairs and now that side is static in movement and don't feel as good as it did. But if you don't repair you cannot even use them at all as they fold out and fall off.
The cups around the ear fits around my ears, but they should be bigger, because small movements will make the cups push on your ears and it will hurt like a bitch after a while. Took over a year to get immune to this.
Build quality 6/10
Build comfort 6/10
The sound is really good. But the bass is way to weak to be enjoyable in the long run. If this headphones had better bass, they would be 10/10 in audio.
I know these are not supposed to have a strong bass, but anyway.. Just make sure that is not a thing you expect.
The treble was horrible when I first tested them, needed to be played in for 30 hours. As all speakers... Sounds awesome after that.