For what it's worth, my landlord just ordered the same 27.5" wheelset as I got in April for his mountain bike, for even cheaper than I paid. He wanted the blingy oilslick finish hubs, too. The rachets aren't as loud as I thought they would be.
https://www.temu.com/27--bike-wheels...949482019.html
Make sure your derailleur can handle nine-speed chains. I'm not sure how those designed for six speeds work with nine.