I know you are going to cringe at this, but he did say he wanted similar aesthetics and good sound quality. What do you, or anyone else for that matter think about any of the following: V-moda Crossfade, Audio-Technica ATH-M50, Ultrasone HFI-780.
If I had to guess, I'd assume Neijii is less concerned with neutrality than with the headphones being "fun".