And if the best headphone in the world did not exist, or then it's required to own several?
For a single headphone, the best versatile candidates are the JPS Abyss, the Stax SR-009 and Omega, see the SR-007mK1, but all these headphones are not perfect: the Omega lacking bass; SR-009 is sometimes shiny or missing body; SR-007 would lack presence in the upper midrange, and its upper treble would be sparkling ; Abyss would also be perfectible in the upper midrange and treble, etc..
Depending on the recording quality and the type of work music listened (small ensembles, large ensembles, music "classic" or "modern") individual defects could resurface or otherwise be masked or attenuated.
Remains the ability to have multiple headphones, each with their strengths and weaknesses which, if they are well operated according to the type of music played, the quality of the recording, and his own taste of the moment, would provide the perfect listening condition of the moment, almost impossible to achieve with a single headphone
for all moments.
Tyll Hertsens, with its selection of "wall of fame" headphones and his current top three for the "open headphones" (SR-009; Audeze LCD-3F and HD-800) http://www.innerfidelity.com/content/innerfidelitys-wall-fame-full-size-open, may have solved the problem of looking for the ultimate and perfect headphone that could, alone, bring all the qualities that one can look for in a headset. This perfect headphone, does not exist, and probably never exist, but the sum of a number of high-end headphones with each a high and complementary sound quality level would bring it. Remains to be defined and especially find the amplifier that would be used best all this headphones.
Here we enter another problem, that of the perfect amplifier that could use all these headphones (without having to buy one for each headphone, otherwise it may be quite expensive, especially if they must each be perfect for each headphone): the ultimate headphone amplifier, universal, versatile, perfectly capable of driving all these headphones do not exist, and probably never exist, but research is ongoing; some very advanced research seem even be quite promising, but it is, for the moment, confidential; not in word out ...
(Note: I ordered the LCD-3F and amplifier Luminare (black and chrome version with black top) ; I hope to receive for Christmas. Otherwise, I just bought the HD-800 and I already have an SR-009 and a HD-600 ; however, I will not keep the SR-007 mk2.5 ; I give it to my brother with the combo RKV-Verto when receipt Luminare)
