Just saw this thread for the first time, and congrats on the Etymotics! For detailed, "uncolored" sound in this price range, I don't think you can beat them. As for the break-in period, I'm not sure what's being broken in.....the buds or your ears. Either way, I think you'll be happy with them. If you were listening to mostly classical music, I would have suggested the Sennheisers, but for stuff like Avenged, I think you got the right ones. Bose........bleah!