I was just telling this to a friend:
If you were asking me a year ago what the most important aspects are of a top performing iem were, I'd have said resolution, imaging and articulation. Over the last twelve months I've come to realize that above ALL, tonality means more to me and is by far the number one criteria. Tonality, instrument realism, vocal engagement are what keep you interested and coming back for more. And in these categories, the k3k is simply the best in my book. I couldn't be happier I bought it.
Van Halen without tonality renders ALL iem's worthless.