Some options here I had not looked at for a bit.WITH USB-C this time:
-Thermaltake view 51 (RGB 200mms can be swapped/sold for a fair amount of you really hate them, I'd just turn the rgbs to a single color or off personally)
-Cooler Master H500m (like above with 2x 200mm RGB. Has a glass right side panel, but again it comes with hiding panels for the wiring.)
-Lian Li Lancool One Digital (because Li Li cases are always an option haha)
There's quite a few airflow focused cases now, and there's an argument to be made that if you go with relatively unrestricted airflow over a blocked off intake, you can run fans at lower speeds and achieve a similiar (not the same) dB level.
Alright, onto options:
It's new, based on the same chassis as the P600S, airflow focused, same size range as the Meshify S2. Has USB-C, excellent all around option, but availability is scare in Canada due to how new it is.
Lian Li Lancool II Mesh
Don't discount this particular one due to the side glass panel! Most of it is blocked off anyway. Same issue with availability right now, as they were both released the same week.
A bit smaller (around ~10L smaller if I recall correctly), but I wouldn't necessarily discount it because of the side glass panel. It doesn't come with the USB-C (separate purchase) and that's what hurts it for your criteria.
Beyond that, I always check Dmitry's HWC videos for an overview, and then GN for detailed reviews and specifics. Here's an overview of the state of airflow cases these days:
Granted I haven't bought "expensive" cases in a while, but the Phanteks P300 and CM MasterCase Pro 3, the steel is so thin. My Cosmos II feels like an absolute tank, and especially my older Silverstone FT03.Maybe ten+ years ago that were a premium brand, but they've hardly changed since. So... Wouldn't be my first choice.