So i mean that i can't really tell what will work for you. This channel can help, he has some decent reviews https://www.youtube.com/channel/UCIw1An1OUp4XIv_h6si2etQ/vid...
I had couple KZ back in 2016-17 and they were pretty much the same as 15-30$ sennheisers, wasn't impressed, but the headphones industry is changing way too fast, so even today i would have to make a market research myself for a new pair if i wanted another sound signature.
Btw my first kinda decent pair was Sony Xba-C10 (got them for 25$ on sale) and it was my 1-st single armature driver iem and i still think that they can play classical solo piano music (like Chopin or Debussy) equally well as any of my 100-200$ headphones (even better then Pinnacle). Yes they have 0 bass and you can't play any modern music on them.
I've had a couple pairs of midrange Sony earbuds (MDR-E821V) that I've used for the last 10+ years. I've replaced the padding with some silicone ones, but other than that, they work great for me.