2) Zeeland, MI
3) Sennheiser HD-650 and Fostex TH-X00. Chord Mojo as source, with USB going through the iUSB 3.0 Micro.
4) HE-1000 reviewed here.
I have also owned a few other high end amps which I think would be comparable. My current T3, Eddie Current Super 7, and Trafomatic Head 2. I'm very interested in how the iCan pro sounds. I was impressed with the standard iCan at it's price point. But at the Pro's price point, it's hard to justify the future...