Loving this IEM so much - I have to wake up in less than 4 hours but am still listening to music. I feel like I'm "rediscovering" each track. So much more detail at all frequencies, and the instrument separation and sense of immersion is phenomenal. I remember appreciating an improvement in sound quality with my Monster Turbines, but nothing nearly as much as this. To my ears, these are head and shoulders above the SE215 and what I remember of the Turbines. Maybe I didn't spend enough time carefully listening to enough tracks, but the SE215 certainly never "WOW"ed me like these have.
I was thinking of making my next mid/hi-fi purchase the VSonic GR07, Fischer DBA-02/Brainwavz B2 or the UE TF 10 since many reviews and opinions place them and the EPH 100 in a similar region RE sound quality - but they all seem to be over-the-ear only. Over-the-ear just isn't my cup of tea, for a variety of reasons. Insertion and removal are more annoying, there's more cord touching skin, etc. Been eyeing the JVC FX700 since they're pretty well-regarded and straight-down, but $350 for a possibly-not-that-significant increase in sound quality... maybe not.