I'd look at the headphones used in this test. Link follows.
http://www.tomshardware.com/reviews/high-end-pc-audio,3733.html
Okay, so let me declare first of all that I am a complete novice when it comes to headphones.
I have an iPhone 5 and I need to know which is the best headphone to use with this one. I would like to know which one would you guys suggest.

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