if you want the best in its sound
check out sound isolator in-ear earphone
Etymotic Research ER-6i Isolator Earphones
http://www.etymotic.com/ephp/er6i.aspx
or if you want more affordable one get
Sony MDR-EX81 Earphones
http://www.audiocubes.com/product/So...Earphones.html
^some people don't like the the "hook" behind their ear but the the sounds that delivers is amazing
not as boomy bass as the previous model "ex71"