First things first: this is my first review on Head-Fi. I purchased these a couple of weeks ago, and it was quickly apparent that they needed to burn-in. I don't know who said that BA's don't need the burn in time, but whoever said that never owned a pair of Westone W30's. So definitely give these at least 30 hours of burn-in before even listening to them.   For so long, I have missed the beautiful, smooth, sparkly highs of my Grado GR-10's. The W30's bring that back, and it really gets me excited! They're not really sibilant at all; I listen...