Comparing headphone outputs between Nakamichi 10S DVD and micro-ZOTL I would say that Nakamichi took a lot of attention to it.
I'm using a Senn HD 25 SP 1.
Zolt sounds better but I think if you want a very nice HP output from a good source, look for Naka 10S.
Will be receiving a HD 600 soon and gona make it again. I'll let you know.