The fit kits on the Shure IEM might be a bit more forgiving and you might get a better fit out of them....? Under any circumstances I CAN NOT recommend anything other than the replaceable cable models since the cables go bad near the mini plug. There are quite of few of very unhappy people out there who bought the older Shure 500 series monitor at well over $400 just to have the cable break. In this business the cables get trashed quicker.
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