Great review! Curious what tips you used on Trifecta? Some tips have definitely given me sibilance until I found the ones that controlled the bass from bleeding and the sibilance at the same time. The Epro ep01 worked best for me. I also swapped to an 8 wire copper cable. otherwise I hear Trifecta exactly the way you do! It’s def one of my favorite iems ever.

I use the Spinfit W1s for just about everything since they give me a great seal. I am also just pretty sensitive to sibilance in general.