Matt, I went with a DAC and Headphone AMP e17 by FiiO, and use Etymotic HF5 navy with the inline mic. I am very satisfied with the tones and the power. There was some chatter about getting line noise from the mic but, as long as you clip it to something such as your collar, I did not experience any thing to complain about. I am very satisfied. I use the DAC/AMP for music - the HF5s are convenient for the iPhone 5 voice calls. I initially used them on an iPhone 4 with a...