Just know that higher RPM doesn’t necessarily mean higher noise. In my experience Helium filled drives can be pretty quiet, and basically all really high capacity drives are helium filled.
I have an arm of shucked WD drives and while I can hear them from time to time, they’re not bad. Also your case makes a huge difference. Make sure the drives are on rubber isolators, and what they’re mounted on can’t vibrate to make any noise. The only noise I hear from these drives is when they first spin up after being idled.
I’m pretty sure that’s only a theory and not something that’s ever actually been confirmed. That said people on /r/datahoarder have raved about those drives for 5+ years at this point, and so far all 6 of my drives have been going strong after 6 years of constant abuse.