Best sounding headphones you have owned?

My “old time” favorite: Sennheiser HD800 (original). With SDR mod.

My current TOTL headphones: Meze Elite. Happy 

You know, it is funny… I keep thinking it would be my Focal Utopia… but it is my Sennheiser HD800’s that I listen to by far the most… 95% of the time. I seldom listen to my Beyerdynamic T2, Audez LCD 2, Ultrasonde Edition 9, Denon 9000 (?)… or my other ones… Grado, ADG, Ultrasonde, etc… wow, I have a lot of headphones..

I think the Focal Utopia bested the Sennheiser until I upgraded the electronics to a tremendously powerful, natural, tube head amp.

Quad ERA-1

Stax Lambda SR (non-pro) here, I have been using them for about 30(!) years and although I have tried many others, nothing comes close for overall SQ.  I like the Utopias, especially for bass, but anything acoustic on the Stax is just amazing.

I've had a lot of TOTL headphones come through here, including Abyss, ZMF, Focal, Meze, Audeze, and others that are slipping my mind, but the winner for me is Susvara through my Eddie Current amp.  I do use Utopias with my DAP though...