I think I'm ready to say that the Edition XS is the best all around planar tuning wise and capability wise for every genre under $2000 that I've heard without EQ. I know that sounds a little nuts, but they just nail it for me personally. Not gonna just up and get rid of my HEKse or my HE6se v2 but they're definitely both going to get less use now that I have the Edition XS.
Ananda is a crappy headphone for the price. Like it all you want, it's not worth nearly the money it costs. Pricing it by ear, I'd put a $300 price tag on it. They're tuned like trash.
Sundara, same story. Boring tuning and bad imaging (I won't budge on the imaging inaccuracies, they're there.) Worth $200 at best IMO.
LCD-X needs EQ to be great but is still decent, and I wholeheartedly think the Edition XS stomps the LCD-X even after EQ.
I haven't heard the Arya stealth but I owned the original for about 2 years and eventually sold it. I think these are all around better with the Arya maybe barely edging the XS out on resolution alone. But again, I'm going from memory and the XS is incredibly resolving on a capable amp. Arya MSRP is $1600.
Edition X v2 I liked and also owned for about 2 years. This is an all around upgrade and considering the original MSRP of $1300, the XS starts showing how good of a deal it is.
HE6se V2 is more resolving but only when plugged directly into an actual bolt of lightning for power and opinions aside, anyone that thinks they're hearing what an HE6 has to offer off of a sub $1000 amp is just plain wrong. But the XS beats out the HE6 on everything but fully scaled resolution and I guess rumble but only if you've pad swapped.
They do it all. Very well extended bass, better mid tuning than basically any Hifiman under $3500, very detailed treble without being fatiguing, huge soundstage with immaculate separation, amazing timbre, capable of very decent amounts of slam and rumble, comfortable fit (I hated the headband on every circle can hifiman I've ever owned but it seems fine on the egg shaped cups where the clamp force alleviates some of the weight), light weight, very forgiving of source gear but also has the ability to scale like crazy and one of the most linear and well defined soundstages I've ever heard without coming off as exaggerated like the OG Arya or something like the HD800s while still maintaining the ability to have inside your head level intimate vocals when called for. Soundstage has a rear imaging and capability of something like an Audeze but massively bigger and with those amazing vertical imaging capabilities that hifiman egg shaped cans are known for. There is no headphone currently on the market that comes close to doing all of this at the same time without EQ for the price or even under $2000 IMO. I hate to be all "matter of facty" about it but it really is that cut and dry of a case if you ask me. These things will astonish anyone that tries them. I was blown away and have some pretty high end planars. I think these could be the majority of peoples endgame headphones (especially if you aren't willing to spend thousands on a pair of headphones) provided they aren't gimping them with bad source gear but even then they'll perform extremely well and will just keep getting better with source upgrades. Power requirements aren't huge at all either, was able to get them decently loud off of an Xbox One controller when I tested it but if you're using something like Dolby Atmos on the Xbox, it might have enough negative gain to be too quiet for some people. I have some custom pads in the works that I'm going to try on these and see if they can edge them closer to that dynamic driver level of slam but they're honestly not all that far off with my Burson Soloist 3X with super charger giving them some good juice (and slightly v-shaped opamps). If you're wondering what headphones you should get at any price under $300 I would say don't waste your time and effort and save for these. I wasn't at all prepared for these to be this good but I hope everyone gets them and stops talking about the Sundaras for good.
Don't think. Just buy them.
There is zero chance you're disappointed and if you somehow don't like them I'd probably buy them off of you as a gift for someone with functioning ears.