I haven’t purchased yet; this is the one I’m currently considering:

https://a.co/d/dDdzptv

I’m in a similar situation currently hosting Pihole on my Pi’s and Jellyfin on a SFF refurbished PC that’s running some other project. I’ve decided to go with a NUC, most likely beelink, and intend to install Proxmox to then run container VMs for each of the various projects to more easily manage them.