Not sure if this was discussed but pay attention to the bios boot capability. I built a system hoping to install ROCK only to discover that my motherboard only supports UEFI boot specification with no legacy boot compatibility. This means no ROCK so I decided on Linux server version. Works well in the end but my experience with ROCK in the past was much better.
@Kevin_Deierling did you end up getting the quietpc? I’m looking at getting one of these: https://www.quietpc.com/configuresystem?productid=6300. Does anyone one like this?