I would like to say in advance that your help is greatly appreciated!
I listen a ton of edm and am interested in getting one of these phones. Most of my music collection is high bitrate mp3s and I do spend some time listening to DI Radio, Pandora, etc straight through the headphone out of an iphone 4. I only have a small fiio amp and the headphone out of my (pretty good) stereo amplifier without immediate plans to buy a DAC or dedicated headphone amp. Also of note is that I have tried a bunch of top tier headphones (not the lcd/he though) and my fave was definitely the Beyerdynamic T1, which is unfortunately more than I should spend right now.