So, i bought them and have been using them for about a week, and i must say i quite like them.
Ergonomics are top notch the pads are the most comfortable i've ever felt, and the headband only produces an hotspot in the very center after long lsitening sessions (but that should be easily fixed by peeling the covering layer and cutting out some foam from the middle and puting the vinyl back, from what i've seen in a couple videos it should look pretty much factory afterwards).
The sound is quite nice too. I must say, the mids feel a bit more recessed than i expected (must be a mix of the 2KHz dip and me only using an x3ii to drive them). Also, They seem quite recording picky, i'm realizing much of the stuff i listen to is recorded/mastered quite poorly now that i'm listening to it with the he400se. That sucks, but it definitely isn't the headphones' fault.
I'm also picking a bit of sibilance/harshness, tho i have a suspicion that the limited power from my DAP is yet again the culprit.
This is as far as i fell i can judge them for now, can't weit to get a decent desktop dac/amp to drive them in the next couple of month, maybe a Dx3pro+ or a X1s GT, or a stack of some sort.
Ah, almost forgot, i got them from amazon.it, and they came with the nicer rubber cable, no signs of the original stiff cable. Not too bad i must say, doesn't scream premium quality, but it feels sturdy, kind of reminds me of a mic lead.