So it's now been a few months since I purchased the HE-560s. I have been listening to them nightly via my iPhone (spotify 320kbs) and my Fiio E-12DIY (opa604 opamp /LME49600 buffer amp) portable amp.
I gotta tell you guys, these things are near perfect to my ears. Night after night,I am thoroughly impressed by these phones! I have been searching for a synergy like this for 40 years! They just continue to amaze. Normally, with any other headphone, I would be bored with them by this time either from listening fatigue and/ or certain colorations of a given headphone.
This is just a reply to reinforce my initial posted opinion of these phones. Excellent in every way!
As a side note, my Psb m4u2 closed back phones are my current go to headphones for those nights where I need to keep the music from leaking into the room. While they are not quite as detailed or focused as the HE-560s, they do hold their own. I can listen to them for hours on end without fatigue. My favorite dynamic closed back headphones to date.