In my time of owning it, my opinion of the X9000 was more variable than with almost any other headphone I've lived with over the years
I own it and still feel it. My chance, after neglecting it for a few months, I put it on again yesterday and feel in love with it again. I usually sell anything that I don't listen to for a few months (and indication I should not own it) but this made me reconsider. I'm using the Mjolnir Carbon amp, and it may well be that a better amp may make the difference (the Grand Caymen has my vote, but I don't have the space for this monster). I simply have too many tube amps, and the Carbon's form factor is easier to handle for now.
Totally respect the point on DCA. Sometimes a brand's house sound just isn't your thing.
I have the exact same take as @BassicScience on DCA. I always want to find what makes everyone love their products, but both the Expand and Stealth, and Corina, simply leave me indifferent to the music. The tuning is consistently not for me. It feels like someone has tuned these headphones to measurements rather than to feel (which, I believe, is exactly in fact what underlines their R&D process). There is definitely a thing called a "house sound". DCA has it, ZMF has it.. an overarching theme, with exceptions. Different brands do tend to have certain ways for tuning that often work well for some vs. others.
I knew the minute I heard the Grand Caymen that it was in that same tier. The T2's bass/timbre was the only slightly differentiating factor. And the Caymen could've been a bit more spacious. Very hard to tell as they both are. I also heard from a LOT of people at CanJam, and many of which I respect, that were blown away by the Viva STX (despite the problems called out against the build). There were simply too many people with this same perspective, I wish I could've auditioned it, but the timing just didn't work out. I'm not trying to start a controversial stat amp war lol, rather pointing out that despite how much I love the T2, once you get to a certain level the general performance is there and the small details and how they match our preferences matter that much more.
This makes me thing of a disrupting idea for CanJams that would be so great for users, but I can't see this commercially ever happening.. have an "estat" room/table, and other themes areas, where various brands bring their best great to be comparatively tested in a section of the show. Now, wouldn't that be wonderful?