Hey guys, I'm considering getting a pair of headphones for under $50 (hence the title name). I've heard good things about the Koss Portapro, the Senn PX100, and the Grado SR60. I've never used open-ear headphones before, but I've heard the quality tends to be better than closed-ear. This would mostly be for listening to music (from my iPod/iPhone and my macbook) in my dorm and when walking around campus. Any suggestions? Would it be better to go with closed-ear headphones? Thanks! Edit: Also, if there any good ear buds for that same price range, post them!