Not trying to go the full ASR route here but since you cannot listen to a DAC without an AMP connected to it, is it really the DAC’s sound you’re listening to? Isn’t it the amp? You say, in the begining of your review, that you hear certain sonic characteristics but in the end, you go on and suggest different amp pairing, according to what type of sound one desires. Kinda contradictory statements there.
Headphone Reviews and Discussion - Head-Fi.org
These folks should understand this?