Jim_May not be the most legit, but I wrote a personal, subjective, review of my pair. http://geekhack.org/index.php?topic=52240.0#post_pt3
It compares my experience with the headset run through multiple source components including the Aune T1 and ODAC/O2 combo from JDS labs.
At the time of the review I was using streaming 320kbps audio as my baseline digital format. Please excuse my writing :)