Looking for Build Advice

I am in need of building a dedicated NAS as my current build is running out of space and showing signs of my in experience when I originally built it (Gaming PC Converted to Unraid and then ultimately Proxmox with Virtualized TrueNAS)

I am looking to finally build a true bare metal TrueNAS scale server that supports 15+ data drives, but have become a bit lost in my heard in reviewing other build threads and looking for some general advice/feedback on my current build

The Main goal of this build will for storage, and at least for now plan on keeping my existing build running for all my apps/VM needs however I may want to move Plex over to the new build (TBD, not a hard requirement)

My initial thought was maybe a lower power build with an Intel C3758 but with only 1 PCI x4 slot I am not sure that it will support the number of drives i am looking for.

Landed next on a or Xeon D with the Supermicron X10SDV-16C-TLN4F which with its combination of SATA ports as well as a full PCI X16 slot can probably handle everything i need and some more from a storage side.

My main constraints for my build is Noise, this will be running in my office so trying to avoid a loud build and cost. I don’t have a hard budget right now, but aiming for <400 for CPU/Motherboard. probably not the right move, but I am leaving RAM out of my initial decision as with current prices i may end up on the low side and expanding later when budget allows

so a few general questions

  1. With the D-1587 getting on the older side is it still a good option to base a new build on

  2. are there other recommendations for a CPU/Motherboard? this will most likely end up in a 4u rack mount so not really constrained on size. Should I throw out the old and look to a newer Xeon E/Intel I/AMD chips that support ECC RAM?

  3. Other General thoughts?

Some lga2066/lga3647 boards can be cheaper than X10SDV-16C-TLN4F. Also, they usually have many pci-e and ram slots.

That is an option, but was thinking the noise of trying to cool one of those might be a bit to loud, but Worth me looking into more. Appreciate the suggestion

X10SDV-16C-TLN4F has 65W TDP with no cooler. Seems like it’s supposed to be in a server case with a nice airflow. I don’t think it’s gonna be quieter than a regular tower cpu cooler. I can be wrong, though.