The Dunu Zen look appropriately metal! I was tempted, but ultimately allured to try out a tribrid. Didn't realize you'd be talking IEMs here -- I went to this thread, skimmed all 60+ pages, then posted my requirements:
https://www.head-fi.org/threads/iem-for-metal-music-and-hard-rock-ultimate-solution.885104/
I hadn't used IEMs (aside from Bluetooth Mpow for work) for a decade, since my Etymotics and Klipsch died quick deaths. Until I'm able to travel again, they will be used when I read before I go to sleep while reading my Kindle, plugged into the NAD D 3020 V2. They made a few suggestions, I spent a week and a half researching a bunch of stuff, and came down to this shortlist -- basically debating how much to spend:
Kinera Nanna (1dd, 1ba, 1e)
iBasso IT07 (1dd, 6ba)
YY ST7 (1dd, 2ba, 4e)
Shuoer/SOWE EJ07 (1dd 2ba, 4e)
Shozy/AAW Pola (1dd, 2e)
Penon Volt (1dd 2ba, 4e)
TRI Starlight4 (1dd 4ba, 4e)
Drop+Empire Ears Zeus (14ba)
Thieaudio Clairvoyance (1dd, 5ba, 2e)
Unique Audio Mini MEST (3ba, 1bcd)
Mofasest Trio (1dd, 2ba, 2 electret)
Fiio FH7 (1dd, 4ba)
Linsoul LZ A7 (1dd, 4ba, 2 piozo)
MoonDrop Blessing 2 (1dd, 1ba)
Reading through the threads of most of these, it seems there is a honeymoon period that lasts for these IEMs for 2-4 months, then the threads die quick deaths, lol. I have to say it's kind of impressive how quickly the tech is evolving in this area. Chifi seems to really be dominating. I like the builds and branding for American stuff like Campfire, JH Audio and Empire Ears, but the reviews are all over the place for them. I was interested in the EE Bravado Mk II but it was dismissed for poor tuning, aimed just to bassheads.
I made an offer on a used pair of Mofasest Trio, never got a response, and in the meantime sold a few odds and ends and had a few hundred in PayPal credit, so I went ahead and pulled the trigger on a Shuoer/SOWE EJ07 from Linsoul (they gave a slight Chinese New Year discount).