I was able to snag 2x 128GB SM SuperDOMs off ebay for very cheap (they were cheaper than all the smaller capacities, heh). According to the SuperMicro product page this is the performance, not that it should honestly matter all that much for boot drives?:
That'll use the two powered sata ports for a boot mirror, figured that was the best course of action for boot drives as to not touch any of the PCI slots so I can leverage them for whatever I want later.
For motherboard I was able to get a X10SRI-F for sub $100 so I said yolo and nabbed it. Next will need to be CPU. I know the 2667v4 was previously suggested however I see the 1680v4 has the same core/thread count but higher clocks (but also harder to source. Cheapest price I saw at a quick ebay glance was $90). I also see the 1650v4 with lower cores higher clock (6c/12t, 3.6/4.0 clock). Finally I see the 1630v4 is the highest clock at 3.7/4.0 but drops down to 4 core 8 thread. I think all these mentioned CPUs were dirt cheap imo.
If I want to focus on say, SMB and NFS performance wouldn't make more sense to go for a higher clock / lower core count CPU? Or am I missing the mark? I guess being able to play around a bit with the virtualization and containers would be nice though, so maybe the previous 2667v4 suggestion rings true? Most of the above CPUs mentioned were dirt cheap as I mentioned so I'm OK with buying different ones if something doesn't work out. Also if there's a CPU I haven't mentioned that's compatible on the X10SRI-F please let me know.
Navigating these Xeons is pretty confusing when you're new to it. Like why are there16xx CPUs newer than some 26xx? Were they just a seperate line of cheaper chips option at release time? I feel like I am not understanding the funamental naming principles.
With that said, any further opinions on my thought procress here? Am I missing/not understanding anything fundamental that I need to consider?
I just want to start somewhere with a friendly budget so I can take my time to learn and experiment with TrueNAS- I feel like I got to bite the bullet and start somewhere. If I end up wishing I was on newer hardware I'll have a whole system ready to use elsewhere. For example I'm thinking eventually a replication target for backups of critical data. So I see this hardware as something I will keep and use either way.
Thanks again to everyone for their feedback as always.