You know, eke2k6 went out of his way and wasted a lot of his valuable time in an attempt to write a review and share it with the community so others on here could have a point of reference. I find your comments rather insulting and arrogant towards eke. If you have a difference of opinion then please state it in a non insulting and mocking way. As it is me and others of this community really don't appreciate reading a mocking statement stating that someone else's honest opinion is invalid because you tend to disagree with it.
By the way I've never had a HD600 on my head but I have had a HD650 and a HE500 on my head and I've had the opportunity to AB them side by side as well as a HE-6. The HE500 is NOT a huge leap in performance over the HD650 and if the truth be known the HD650 is easily the better cost performance can. Can't really speak of the HD600 since I've never heard it but if what I've read holds any water it very much sounds like a headphone that's even more of a good performer for the bones spent. So that you also know, I heard the HD650 and the HE500 being driven on a Asgard 2/Bifrost setup, on a Magni/Modi setup as well as on a Nuforce DAC-100/Nuforce HAP-100 the latter of which was also being used to drive a HD800 and a HifiMan HE-6 with no problems whatsoever. I was even able to drive the HD650 and the HE500 within acceptable passable parameters with my puny Leckerton UHA-6S MKII/CLAS-db mobile rig setup. Speaking from experience I personally find your argument concerning amping quite invalid as well as your attitude on this thread insulting towards the OP which leaves me no other option but to report it to the site mods and have your posts deleted.
Good day sir and enjoy your HE500.