I'm a fairly serious carguy. On a forum dedicated to one of my cars, one often heard from someone who claims to race and asks which tires he should buy. Our response is always, "Why don't you know?" Similarly, albeit in a round-about manner, when it comes to studio use it's not a matter of which transducer is most accurate; it's about which headphone you're used to.
I agree, but I don't think this thread is about which transducer is most accurate, it's about which is the best headphone, in each category, for studio use. That's not (necessarily) the same thing as which headphone, in each category, is the best for casual listening, for field work, or for use on the move, etc, it's specific to studio use. There are some headphones which excel in more than one area, and some of those are on the list, but I think that there are certainly some hp's, particularly in the closed back section, which may be very good for studio work, but wouldn't be a first choice in any other situation. Yes, to a large extent the hp you're used to is going to be the best, but I think it's still valid to come to a collective consensus about which hp is considered by most people to be the 'best' for a specific use.