hi , I'm new here and I want to get to upgrade to better headphones , currently I'm undecided between the hifiman he4xx , sennheiser hd6xx and the beyerdynamic dt990 pro , I'm currently not planning on purchasing an amp , I'm a heavy user , mainly watching very HQ media on my phone and laptop for long periods of time , I currently have closed back headphones , I have never listened to open back ones , I care mainly about the sound , and the like 10% about comfort , but I'll prefer headphones that sound the best rather than the most comfortable. thanks in advance.(btw , I'm from Israel).
I have also heard some bad stuff on the headphones , that the hifiman he4xx has very bad build quality and that some of them come out of the box half dead.
that the 990 pros have a bad non detachable and have ear hurting treble.
that the hd6xx have some kind of veil , and also hard to power without an amp.
thanks in advance.