First impressions: Headphones have a very clear presentation and great detail, but very bright to my ears and lacking some lushness in the sound. I tested the Dragonfly with my Westone 4r's and it does seem to be somewhat brighter than when I use them with my fiio e11 - so that has something to say too. There's no distortion of the higher frequencies though, when listening to opera, which was very important to me, but at the same time it is too shrill. Overall sound is very impressive though, just not lively enough for me to be honest... I started listening to them for an hour then had them burn in for about 4 hours on low volume with white noise, pink noise, radio white noise, 20-20000 Hz frequency sweeps, 10-30000 Hz frequency sweeps, 20-200 Hz frequency sweeps, with a minute of silence in between each. I love it when listening to my Carl Nielsen Symphonies, but especially older recordings lack the warmth. They sound great with Infectious Mushrooms Vicious Delicious, here the bass seems tight and well balanced. Otherwise I do lack some bass. I also notice that the left cup is slightly louder than the right, now I don't know if it has to do with my ears, so I am going to let my friends listen to them as well - see if they hear it too. I don't seem to have that problem with my Westone 4r's though... Still not sure about what I think of the Dragonfly, sound is definitely clear and detailed, but I don't know about the amp section, whether it is just is too bleak.
EDIT: I am getting very big differences in soudn between using itunes alone, audirvana and amarra. The soundstage, speration and clarity seem best with audirvana, but very sharp sounding. Itunes alone sounds a little warmer but much more muffled. Amarra seems to be in between the two. I will try and run my fiio e11 through the DragonFly and see how that sounds... The DragonFly is very silent on its own, adding the fiio will surely add som hizz...