i own one of the lower priced ultrasones: dj1pro and find it to be nearly the best phone for my musical tastes that i have heard. this im sure will continue the tradition: the 750 is one of my all-time favourites.
however, if the headband is the same: i cannot use it. it will just slip down my narrow head. if only ultrasone would fix this, i would buy from them again. i have to use extra padding on my dj1pro... bother me
My HFI-780 is a bit tighter on my head than my 750 and 2500, if that's any help to you. Maybe fit you better?