for headphones? AVR headphone out, a particular (this is new to me) stack of HPA\/DAC? Some other method? Last headphones I had were Grado, and my grandkids took turns destroying them somewhere around 4 years ago and have not had any since. Recently ordered the 80 Ohm Beyerdynamic DT770 Pro. Choosing a certain impedance was not all too clear when researching headphones. The only thing I really had to go on was that I need closed back, and that there was mention of the 250 Ohm version being a bit on the bright side. I would most likely at the very least, have these hooked up to a portable HPA. I'm not much for phones as a source, especially since all the phones I have had, pretty much have had crappy\/low power audio.\n\nSubjective reviews of headphones seems to be as whacky as those with other areas of audio. Same eye-roll terms such as "fast" and "burn-in" I saw being tossed around was not much for confidence, with many others afraid to admit great performance for anything nearing the budget realm, and who are obviously tainted by collecting too many high dollar versions to be caught slumming it with the budget crowd.\n\nAlso, what do you feel is a good marker for diminishing returns in the headphone world? Seems like it should be a much more narrow margin since HP don't have a lot of area for exotic materials and finish?\n\nETA: I have my Denon AVRs, a topping E30II Lite DAC, and my DIY Starving Student II Pre\/HPA hybrid.