Considering your GPU and CPU choices, you might as well go for a decent motherboard, but this one is pretty overpriced imo.
All z370 have a good enough soundcard, they're already somewhat premium made boards. I'd suggest a more mainstream MSI Z370 gaming plus or an ASUS prime z370-A.
ROG STRIX boards have 50 bucks wasted on aesthetics (unless you really want rgb on your mobo) and it's of a bit higher quality in terms of materials. Performance wise, though, absolutely nothing is changed.
You can save almost 100 bucks going for a cheaper option, your choice. If you want to look cool, though, then you'd have to change your build to be color coded and all of it in the first place.