I pre-ordered the H300s and heard it and to my tastes, the DN2K is the better IEM. I still stand firm that "the H300s win in bass, clarity, detail retrieval and treble extension". The H300 clarity is pretty insane to my ears, which help in the detail retrieval and treble extension. The bass also matches the hype it's getting and its wonderful.
With that, I still sold the H300s, and consolidated the DN2K as my sole IEM, and definitely don't regret it.