I have the HE-500s and find them to be a distant third to the LCD2s and PM1s. Dunno how the HE560s fare, though.
Between the PM1 and the LCD2, it isn't a contest, as far as sound goes. The LCD2 are a noticeably better headphone. Better bass, better dynamics, better attack/decay/timbral richness.
If portability/travel and easy-to-drive are included, the PM1s shine. I find in happy to take the small hit in SQ for these other factors. In fact, the past 2 weeks I have been travelling with a AK100/Quickstep/PM1 rig and enjoying myself. At home, the PM1s never get any headtime, though.
Also, comfort may be an issue. The PM1s are comfier for sure, although I can handle the LcD2s for a few hours easily. Living as I do in the tropics, I find that the biggest fit issue for me is my ears getting warm from being enclosed, and all cans cause this.
Edited by vkalia - 6/11/14 at 7:11am