depending on what you're using them for is the key... if your DJing and the the music is really loud though your monitors and PA you want headphones with a thick bass response. rane actually manufactures a headphone preamp to address this... if you're doing field recording as in a film production, you want something that is light yet gives a higher frequency response as to aid in both comfort and picking up little nuances that you don't particularly want in a film (cell phones, unwanted voices, shouts). if you're working indoors in a controlled studio environment, you might want to go with a headphone specifically made for referencing digital sounds. if you don't give a damn, go with the cheapest...