I believe that I would prefer closed-back.   When I search the three models on amazon, I can't really find a difference between the specs, if you could give me the main differences that would be great. I also see a lot of headphone amplifiers in the "frequently bought together" section, what...

Greetings all, and thank you in advance. I've got a big head, 23 and 5/8 inches around, and finding headphones that will last more than a couple of months has proven to be rather difficult, they will all break within that span of time. I had a pair of Koss headphones that lasted me good long...