After spending a while longer with with my new setup (BF 2/64 -> MJ3 -> Arya V2) I think I can give some thoughts about it. Everything across the board is better. Detail, sound stage, less annoying treble in certain songs, imaging, etc. It can sound so gentle with
violins while also turning up the energy with
guitars. It even makes songs that I thought just weren't going to sound great on hi-fi sound better. My main complaint with these headphones on my previous setup (multibit card -> jot 1) was not enough engagement, but this fixes that problem entirely. It feels like I'm experiencing the music instead of just having it presented to me if that makes sense. Thought I needed different headphones to get the engagement I was seeking.
I'm extremely satisfied with this and I can see myself being done with headphone gear for a long time. I was expecting a slight improvement and maybe some buyers remorse, but this exceeded my expectations. Do keep in mind that I'm not experienced with lots of gear so I don't know if this is better than stuff at similar price points. This is just me rambling about it to people that understand because I love it so much.