I am looking to buy a mp3 player around the first buisness quarter of 2007 and before I buy anything I like to do ALOT of research well since this will be a brand new mp3 player I would like to get good speakers so i can fully enjoy my mp3 player. Well what is a good in-ear speakers and when looking to buy speakers what are the most important things you look for. I heard sensitivity would be higher for more loudness and the frequency to be more spread out or something like that.