Cayin YB04 is a first IEM by Cayin. It is priced at 499$ and has a lot to prove. Spoiler Alert : It does.
FA9 is an all balanced armature driver flagship from Fiio. It's priced at 499 USD, and it promises to deliver top tier sound quality with 4 different sound signatures.
Shozy Form1.1 is a mid-end model with one dynamic and one balanced armature driver. It is priced at 75USD. I did order it randomly, and I definitely do not regret it.