http://www.headphone.com/ is a great place to research on different types of headphones. In ear type IEM's did not work for me because of the changing temperatures on the mountain, they fit well only on the warm days. I'm a big fan of Koss, I have a behind the neck band holding a pair of speakers from some Porta-Pros that I've had for years. With a good source and an amplifier http://headstage.com/The-Arrow-Amp:::1012.html?XTCsid=1406053c0c687870663a41757992b717 the KSC=75's sound great, some like the Yuin's but I've never listened to them. Good luck, Kipp