A very interesting website:
I've posted about this before. https://soundcloud.com/sonic-sense-pro-audio/sets/headphones-test
I used that site to decide the ATH-M40x are what I'm looking for. I own a couple of studio cans and they all literally sound just like that website's recordings. I can attest at least for the K240S, ATH-M40x, HD 280 Pro, ATH-M50, SRH440, MDR-7506, and MDR-V6 all sound just like their recording of them, as long as you compare the original track they provide with the sound from the headphone you are interested in at the same part of the track. That is how you can discern colorations, and that's how I came to the conclusion that the most neutral closed headphone under $100 is probably the ATH-M40x.
Edited by metal571 - 6/19/14 at 2:19pm