Dobrescu George
Reviewer: AudiophileHeaven
Oh, that makes more sense.
Ultrasone also makes an edition 10, but I think that they are really different from HD600 and Hifiman's edition X in signature, they really go for different things.
All in all, hifiman needs a ton of power to be driven well, if you're driving them well, they should sound good. My top picks right now are LCD-4 for well-driven planars though, was able to hear one and it sounds awesome if driiven properly. The only hifiman I heard was He-560, which are really well regarded and while the mids were really good, the top end was quite... not as sparkly as I would want a TOTL headphone to be.