I own the hekse and have briefly demoed the arya. I found the arya was a great entertaining hp.
the hekse detail and precision is very very good.
and the hekse is great with everything I have tried it with. From v281 and taurus to kann cube to ipad to iphone.
Very easy to drive and will already be a great headphone if changing/upgrading gear as you go
but they are more expensive of course. I have no regrets on having bought the hekse
ps you can always buy a cheaper hekv2 2nd hand and look at uografing to hekse for $1k through hifiman (i‘m guessing they are still doing that)
edit: i just saw i posted sonething similar before
TL;DR : see my post earlier on this page - oops