[eneveu]

I've recently researched headphones, and the most interesting resource was Head Fi ( http://www.head-fi.org/forum/ ). More specifically, these portable headphone reviews: http://www.head-fi.org/forum/thread/433318/shootout-78-porta... .

I also discovered Headfonia ( http://www.headfonia.com/ ), a nice blog.

After reading http://www.headfonia.com/closed-cans-shootout-m-50-esw-9-t50... and many discussions on Head-Fi, I bought a Sennheiser HD-25-1, and I'm really happy with it ;)

This does not directly answer your question, but I think it may still be of interest.