My son had been wasting earphones like John Travolta had been wasting gangsters in the "From Paris with Love" movie. Fortunately those crappy fake iPhone plugs or similar didn't make much of a dent in the purse. So one day I decided it's time to "end his suffering" by getting him some decent cans. I wanted him to have open headphones, else I feared that he'd loose contact with the world around him. The best I could find for him were the AKG K142 HD semi-open headphones.
Not sure these cans qualify for high-end, but at any case he's sold. He drags them everywhere and is super happy with the sound. Never thought he'd care.
That's how I justify costs for the higher end headphones. Not just the sound, but build and durability. Spend a few hundred on quality pair or buy 10 crappy ones? SRH840 lasted me many years before finally broke, but that was from constant shoving them into my backpacks, I was not kind to them. AD900x still look pristine to me and I don't have headphone stand, I expect them to last me another 10 years, but I'll probably upgrade or get something different by then.