I love it.
While I acknowledge that the colors are in the same class as Calm Depths and Abyss, I have zero interest in those keysets and a take_my_money.jpg reaction to this set.
I'd be down for any of the options, but #2 (mono navy) is my favorite followed by #4 (muted blue, mono navy). On top of the colors looking fantastic, I really like the idea of this being a GMK set. Good luck!