Our fellow friends at Arstechnica have written a very useful roundup of 6 portable headphones. The products reviewed are split up in two categories, the US$50-and-below and US$100-and-above price ranges.
By testing these headphones with a standard CD player, portable CD player, portable MP3 player and headphone amp the portability, power consumtion and sound quality vs. price are checked.
Besides the testing Arctechnica have also written about every headphone style available, for an example the difference between supra-aural and circumaural headphones.
Read the roundup here!