iFi makes some great stuff, and this thing has me very interested. But does it support the microphone on my wired IEMs?

Now that I'm part of the conversation, where should I start? Headphones, DAP, or DAC/Amp? I've heard I should focus on the component closest to the ears, and work backwards. My current DAPs include a 4th gen iPod(with a wheel, not a touch), a Benjie S5, and a phone (Moto Z Droid, with PowerAmp)...

I've been lurking for a while, and decided to join up proper. I'm slowly figuring this audio thing out. I have questions, and I figure this is the place to find answers. I'm not ready to drop a paycheck on a pair of cans just yet, but I do have a small collection of IEMs and buds. I still...