It turns out that I don't have narrow canals, and the Comply P-series slim tips I was using with the W3 was too "slim" for my ears. I used the regular sized tips that came with the W3 and they worked perfectly for noise isolation, but they expanded too much and made my ears feel like there's too much pressure trapped inside. I bought some Comply P regular sized tips and holy mother of God they are AMAZING. I never loved another IEM so much as the W3 with these tips, I would rank the noise isolation as 5/5 and comfort 5/5, and it has the most enjoyable SQ out of my other 3 IEM's that I bought (GR07-BE, X10, MA750), build quality 5/5 and accessories 5/5. It complements my HD650 perfectly as the W3 is very energetic, speedy and has elevated shimmery treble, making my EDM's sound the best I've ever heard. Man I'm freakin in LOVE with the W3!
Best IEM I've heard in that price range