my mood changes fast, so right now i am searching for an iem that i can listen to for hours, without getting tired.
the best, smoothest and fatigue free i have listened to, is the westone 4, but there are 2 issues i have with it: first it is the price. second, it lacks a little in the sub bass. i know, that it is able to go down to 20hz, but it does nearly no rumbling, since i am a low volume listener.
my source is an iPhone 4 and i listen to genres like, chill out, ambient, film scores.
i do not need much isolation and i know, that for the price point i will not get the details and technical perfection of the W4. but it should be enough, if the iem is fatigue free, smooth and relaxed. highs could be rolled off.