Audio-Technica - ATH-M70x

ATH M70x here - flatter for studio use but they are both great cans. I cross reference against my studio monitors on them and tweak back and forth a little. (Focal Alpha 50s in a treated room)

Love my HD 25's. They can get a bit clampy around the ears after a good 2 -3 hours wearning but have a great seal on the ears and amazing sound but relatively flat sounding. I have a good in ear monitors (Linsoul KZ AS10) but find they get sweaty and painful over time when mixing for 1 hour plus. What I find myself going to the most are my Audio Technica ATH-M50X closed back headphones (if I'm not using my HD 25) as they are the most comfortable of the two. The ATH M50X are close to flat, but the one up from them, the ATH M70X, has more bass and more excitement in the highs imo. Same comfort aswell. Most closed back headphones incase the whole ear (over-ear) aswell. The HD 25's are more of an on-ear then over-ear (probably why it's a bit more clampy) Something like a closed back might be something to consider. One more type you could look at are open-back headphones. I sometimes DJ with a pair of Beyerdynamic DT990 PRO'S when I just wanna have a chilled mix and not get too hot. You'll be able to hear your environment around you and you'll get some music bleeding through. But great if you want maximum comfort, airflow and to be able to hear what's around you. But probably not a transient and bassy and existing. hope this helps :)