Hey look another weeb!
Let me drag you over to the AAMML thread where you'll get better answers. http://www.head-fi.org/t/586040/official-asian-anime-manga-and-music-lounge/165045#post_12458022
The guys there have the thread marked on their mobile so you should get near instant replies there.
If you don't expect too much bass and don't mind a little heft, the best price
erformance system for mids is a stax sr2170 system. If you want a lighter solution: Mio Akiyama recommends an AKG K701 with a good amp/dac. Otherwise, Miyuki would recommend and AKG Q701 if you want more bass and warmth.
No I'm not kidding. I own all the systems above and I disliked any other solution. Granted I do listen to higher octave vocals like nanoripe, kano, hana kana, reol to classical renditions, jazz and etc.
Mids and bass don't mix well together unless if you want a more smooth lush presentation like sennheiser hd600's. The AKG and STAX are vibrant and clear, with the expense of sounding a bit more analytical.
I do recommend posting a question in the thread I linked though.
I can't recommend hd800's because your ears will bleed with jpoprock, and he400i's are disappointing with upper mids and lower treble presence.
The guys at the AAMML forum do also recommend any Audio Technica headphone except the M50 so you could ask them about that.