Music ain't what it used to be
When I used to read the Hi-Fi press, music was all about live and recorded and listened to in acoustically favourable surroundings. The nirvana was having an acoustically neutral room built around the sound system.
The music quality was important then, and everybody was striving to have the music sound like it did when it was played.
Nowadays, it is only classical music, and a very small amount of audiophile recordings that have this goal. Almost everything else will be autotuned, compressed, expanded, mixed, spatially processed and otherwise messed around with to death.
As a result, it's pointless paying this much for headphones if you are listening to modern recording, distributed digitally in any lossy format, in noisy environments. Pay a few 10's of pounds for something that is comfortable and produces a sound you like, and buy a few pairs.
My current set for everyday use are generic ear-canal, Omega brand (a crap stick-the-name-on-anything brand) that cost 6 quid that I found by trial and error. The sound is adequate, even with uncompressed audio, they block external noise out well, and they are so cheap that I don't worry about breaking or loosing them. And I don't look like a twat wearing them on the tube (not that I ride the tube often). I do have a couple of pairs of in-ear Sennheiser 'phones which I prefer the sound of, but I worry about knackering them every time I pull them. out of my pocket.
My home based Hi-Fi, which was always best-of-breed at purchase time low-to midrange kit (cherry picked NAD, Project, JVC, Technics and a pair of ancient Keesonic [niche brand from 25 years ago] speakers) has a pair of mid-range over-ear Sennheisers, and a paid of elderly Beyer-Dynamic headphones. I am very happy with the sound, and must people still go Wow! when they compare it to their modern systems. Especially when playing vinyl!
Bring back real music, that's what I say. Especially get rid of autotune. Anybody who can't sing in tune without this should be boo'd off stage.