I posted this to Reddit earlier this week but have since made an account here so I thought I'd do a straight copy and paste of my initial impressions here. Unfortunately, I haven't had much time to listen since, so my comments here still stand.
I've got the Dunu Mirai in hand, luckily, after some ****ery by my local post office. They're a flagshippy collab with Precogvision and headphones.com is the only retailer carrying them, as far as I know. The packaging is nice and the whole setup is a very unique color way, not something I would normally go for but I dig it. How do they fit? Good enough, they're deepish and fit similar to the Gaea, so much more manageable than something like a Monarch but ergonomics are nowhere near the level of the SA6. How do they feel? Fairly light (a plus for me), not quite as hefty as Gaea's and much less than a pair of Monarchs so overall a tad less"premium" feeling in hand but not, not nice. The cable is *NOT* (thanks u/Gromu, see their comment) the same as the SA6 but similar and comes in an interesting matte white color and slightly different texture. How do they smell. Like a fresh pair of kicks. How do they sound? It's hard to say, I only have time for a handful of songs and a quick post tonight so this is very much my first impressions. Drum strikes sound snappy and while these aren't mid-bassy, they do have a satisfying sense of impact and didn't sound lean in the tracks I tested. I normally don't hone in on vocals too much unless they come across too intense, hello Gaea, but female vocals didn't sound husky or shouty and male vocals never thin, so balanced I suppose. Horns often come across too intense for me and electric guitars too biting on something more Harman-tuned but horns are nice here and electric guitars sound smooth, a little much so, possibly. The upper treble and air frequencies are less than what I'm used to with my other gear so cymbal crashes come across less shimmery than my usual but also much more correct sounding without the exaggerated decay I've come to expect on my Trio's. I didn't notice anything piercing in a track that has some particularly rough high hat strikes.
Overall they seem relaxed in the right ways for me while not sounding overly soft like the SA6. Actually, if I had to boil it down, I'd say they retain a lot of the characteristics of the SA6 and are just a straight up upgrade to the OG SA6's. We'll see how the fare over the next few weeks as I get more acquainted with the sound and play around with different eartips.
Tracks I tested with: The Package by A Perfect Circle, Caverns by Thank You Scientist, Skin by Bent Knee, Undergrowth by Caligula's Horse, Post Scriptum by Iamthemorning