My HE560's came in today; 1 day a head of schedule!
Coming from AD700's, boy are these different. There's stuff in the basement, and there's rumble from a Bass! To me, there is no "over-brightness" because I'm coming from a place of scorching Sun. In fact, female vocals seem "veiled" in the higher ranges because the AD700's are so bright. But, there's a sizzle to Synthpop (Tommy february6) that I never heard before.
The difference in sensitivity was a bit frightening as I have never had to turn up my computers to even 50% before the AD700's became too loud. With the HE560, I had to bring in the Nakamichi and turned the Nak up to an 11!

Good positioning in Borderlands2 with THXStudio; gunfire and explosions seem sharper.
The Neutrik 1/8" plug is huge, and the clamp force is high but under uncomfortable. I can see wearing them for hours without issue.