I’m very happy with my Beyerdynamic DT880 Pro.
Those made a big step up for me in mixing - very detailed sound, strong highs but because of that you will notice differences in very delicate eqings in that range. Very wide and natural and also vertically consistent stereo image to just some cm outside of the head. Those are open cans, so environment noise might keep you from benefit. They have “linear” (weak) bass, so for electronic music I use an eq with a gentle slope, amplyfing from like 2-4 db in the subbass up to the mids. They are able to deliver some volume though, so boosting the subbass seems no problem. (Sub)Bass is a bit blurry though, for tuning it I have a second pair of dj headphones that give strong and clear bass.
I could imagine they are great for working with orchestral music - very clear and detailed sound, especially for accoustic material. It is not perfectly linear, with stronger highs than would be natural, but that will just aid in working on delicate material, like a lens can be useful to read tiny writing. You hear every cough in the audience and every pin dropping on the stage on good recordings, every clipping and also they show ugly sound just like they are: ugly. Very good build quality (many metal parts…) and wearing comfort.
If the thing needs to be closed for environment noise reasons, then knowing the dt880 I’d go for the dt770 - I am thinking about buying those next, for on the road sessions with the laptop. But for classical stuff maybe the strong sub is a problem on those. dt880 has without eq a very natural sub on accoustic material, on electronic you will dig it, but only when it was mastered correctly.
Try to go to some store where you can bring your music and test and compare headphones that have some hours of playing on them. Don’t try to order multiple new and straight compare. I find such headphones change their sound in the first X hours of playing, when you fist put them up they might seem like they have a slightly weak, yet taut bass and piercing highs, but whithin some use some materials will loosen up and the sound can be much smoother… My dt880 pierced when I got them, now after some time that slipped into the background, and also my hearing got used to the peaky highs, now I can listen loud without any pain, and if there is pain, I know it is either too loud or the highs in the material are too strong…you will instantly notice with these cans.