I might suggest building your own dedicated PC as many others here on the HW Forum have done. The big advantage is you can secifiiy the components you want. Plus you can get the OEM (just the OS) Windows version that doesn't have the 'bloatware' or LE (Limited Edition) promotional applications installed as many pre-built computers have.
Assembling your own PC you can pick MOTBs that have the capability to accept 128K of RAM! Not that you'll need that but its nice knowing that when you want to go that high, you won't have to 'eat' RAM purchased earlier, especially with a prebuilt PC. Many of the prebuilt computers have all DRAM 4 slots filled. So if its standard with 8GB of RAM, the four RAM slots are filled with 2GB RAM modules!
Customizing you own PC build you can research which fans are to quietest. Here is a power supply I recently purchased for a HW project and the name says it all!
https://tinyurl.com/y5qjavxdDanny B.