My first set of "premium" cans were the Grado SR80's, driven from an old classic iPod. As you can expect, I was blown away by the sound quality compared to those little white earbuds. I've tried other headphones in the $200 range including AKG K271's, UE triple.fi's universal IEM, and my latest set, the Beyerdynamic DT990-600. To my ears, all non-Grado phones lack a certain warmth in the mids. The DT990's in particular, probably due to their strong treble and bass, seemed lacking in the midrange. Thanks to HF's classifieds I found a pair of Grado...