HD6XX master race. comfiest headphones ever, i can wear them for 10-12 hours straight or longer and not even realize they're there. hell i've been on drug binges and had them on for 30+ hours only taking them off to piss
i've had them for 6 years and they're just like the day i got them, i just replace the pads from time to time
open backs are the White mans headphone