Is 5640 RPM acceptable? WD reds are all about 5400rpm and are basically the gold standard for NAS HDDs.
You can shuck them out of WD easy store drives sold at best buy. They’re white label drives from WD, but they’re all based on the red/red pro drives.
I’d just give you a regular ass large fry if you ordered that.
If you ask for extra lettuce and get a second leaf for free most places won’t bat an eye. But there’s usually a way things are portioned the way they are. Nobody wants a burger that’s one 1/8th pound patty and 3 inches worth of solid lettuce.
What I hate is when you click on what’s supposed to be an image that you’d expect to expand, but instead it’s a link because the embed isn’t supported. Then when you hit back you lose your place because the page your on isn’t saved and you’ve lost your place trying to get back.
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.