I'm looking for some headphones under $50, portable headphones especially. I've been searching for some time and have found a number of options, but I would like some better advice. I listen to a broad diversity of music, so the headphones need to be all-around performers. I also live in Africa, so the headphones need to be able to take a beating. I have no headphone amp, but if the headphones are cheap enough I could get an amp. For design I've been looking at stuff like the Sennheiser HD 238 or the JVC HA-S600, but I'm not sure about the sound quality of either of these.