1TrickPony
Headphoneus Supremus
LZ-A4 fits your budget then. Less tuning options but still customizable. Haven't heard it personally though, so I couldn't comment on the sound.
Owned both. Lz-a4 is the more fun tuned.
I'd say dn2000 is the more balanced yet still retains most of dynamism you'd want.
Best vocal body actually for the price tag.
(Though you for more tuning optionsfor less with the lz)