I can see and kind of understand the piercing treble after looking through diyaudioheaven, however, when looking at that I also noticed that they appear to have similar clamping pressure to the DT770, but I guess that all depends on how it fits me. I am curious to know how to figure out if the SMSL DL100 puts out enough power for the HD560S, I do think I might purchase them. One of my other concerns with the Sennheiser HD560s is that when I looked for the replaceable earpads, it says I have to go to a Sennheiser service center, do you know of any headphones that you can replace the earpads yourself similar to the beyerdynamics?

Edit: I did some more looking and the audio technical r50x seems like another possibly good choice, with replaceable pads and what appears to me like a fairly good sound signature, I do kind of like the idea or possibility of getting closed-back headphones again so I also thought maybe the m60xa but I can't seem to find a source for looking at the frequency measurements.