Hello. I want to purchase the dt 990 pro x headphones. I liked the 770 pro x, but the stage was too bright in the highs and the bass was lacking. How does the beyerdynamic dt 990 pro x compare to the dt 770 pro x and the dt 900/700 pro x? Dt 900 pro x are not comfortable, I don't like the headband during long sessions, it puts pressure on my ears. The scene and comfort of the dt 770 pro x are better, but the detail of the 900 pro x is better. Please tell me more about the dt 990 pro x. Is it worth buying them, or is it better to get the 880?