I use Hidition NT6 and recently, well, 6 weeks before I bought Unique Melody Merlin.
Then same as you, mine is delayed because of the cube. I can feel your pain.
However, if you are interested in buying one from Hidition. I think I can help you, as I am a Korean living in South Korea.
Not saying UM is bad, but Hidition is quite decent, both in sound and build quality.
Also, their build speed is phenomenal. Mainly because they're not really in the global market yet. Anyway I got mine in about a week.
Let me know if you're interested in Hidition. Also hope your Miracle to be perfect as you've waited this long (as I am waiting now).
May I PM you regarding the NT6 later today, I have some interest acquiring this or the pro.