I own the soundmagic e10. Those rm135 IEMs are indeed magic. The piston 2.1 is too bassy and low trebles imo. Perhaps need to give it time to break in before the final verdict can be given. My wife loves bass heavy IEM's so i happily passed them to her. She said its definitely better than her samsung phone earphones. Good price value nevertheless la but i advice u read up reviews on the E10.