headphones for the gym

hi all, i am looking for a pair of headphones for the gym. must be in ear tho, i am using a phillips go gear 8 gb mp3 player at the minute. as i dont want to damage my blackberry bold lol.when i got the go gear i got rid of the headphones that came with it straight away they  looked like they would have done damage to my ears, and bought the senheisser cx 300 but they are too bassey. i am looking for detail in the music, and listen mainly to rap/hip hop

thanks peeps