Desktop

For me I re-use my older and found cases as the form factor of motherboards and more don't change. Quiet is usually not a case issue but your selection of fans, cooling and sometimes, hard drives.

But some insist on silent PCs. Here's a look at that: https://silentpc.com

https://www.newegg.com/p/pl?d=computer+case&N=600546036%20100007583

Pick one that fits your size specs and has the features you want.

Read the reviews.