I currently have the DT990 250ohms with a Schiit stack and am looking to upgrade. Love the sound of the DT990s which led me to the DT1990s, but I also found the Focal Elears which are around the same price used. Which one should I go for? I hear they're quite similar, so I'm split here.

My 8 year old Sennheiser 558s began rattling and I found online that it's usually a result of a hair on the driver. Sure enough I take it apart and there's a hair, so I clean it all out and put it back together. After that, music sounded weird, was slightly louder and clearer in the right ear...