Looking for input - new mainboard for my NAS

[DuckToller]

Question to the pros and the computer DIY brigades: What would be your choice?

I am contemplating 3 different solutions for finding the best route to go to re-build my NAS (UNRAID 6.7 with 8xWD Red:2 Parity/6 Data)

- looking for a newer ATOM C300 supermicro board with 8+ SATA connectors (i.e. SuperMicro A2SDi-8C-HLN4F + New DDR4 RAM - which is nice, but comes as a unwanted financial challenge),  appr. 6-700 Euro
- A 2020 consumer (gaming) main board (Micro ATX or smaller) from ASUS/ASROCK/GigaByte, sporting 6xSATA and M.2 connection plus PCIx16 for connecting a dual GBit Intel card (consumer standard is Realtek), and a low powered AMD Ryzen3 processeor, needs newer RAM as well. Appr. 350-400 Euro
- buying an out of lease office system (i.e. HP/Dell) with Intel Xeon E3 1240/60 and 16Gbyte RAM then transplanting it to a suitable Intel motherboard like the Asus P10S-M-DC. (alternatively a new Xeon E3-1220v5 with 8GB RAM), Appr. 500 Euro
All of them solutions have some advantages .. pls share your insight and experience
Cheers, Tom

[DuckToller]

Thank you for helping me making a decision 😉
I ordered a Gigybyte C246 board (intel1151) the C246M with 8 Sata3 ports, using a Pentium Gold 5400 boxed (coffee lake) and some pretty standard Corsair value select 16Gb DDR4 2666 RAM (I've used this quality the last 15 years and had not a single fault to note, the old NAS MB was running with Corsair XMS3) - Invest 350 Euro.
Thanks for reading 😉