i have had my er-6's for a while and now the wires are coming lose at the end and im only getting sound out of one ear. im thinking about upgrading when i get a new pair. i was looking and what do you guys think between the Ultimate Ears Super .fi 5 pro buds, or the Etymotic Er-4p's. i enjoyed the er-6is but i think i want to step it up a little bit.