From all of these reviews, I seriously want to see someone compare klipsch custom 3's where the only thing I have to say badly is with cable noise, and westone 3's which have a mix report.
Westone 3's are AWESOME!
Try W3's if you can, or just buy them and listen to them. (as there are a little chances that you don't like them as much as your previous IEM's - depends on your taste)
as u might already know that W3's aren't so easy to evaluate, so you can't trust other's opinion. They might be perfect for your ears, or the sibilance might irritate you until you find a solution (aka, the right tip)
In short, buy them --> try all tips available --> Decide
I personally love W3's! and definitely recommend them!