Exos expansion?

[Enquiries]

Ok I have had to redo my current server, it is at the moment, i7 14700k in a Gigabyte Z790 board with a 10GB network card. running Unraid. there is a 2 TB M.2 drive for cache and 3 x 8 TB Seagate Iron wolf Pro drives plugged into MB SATA. I put uncompressed blue ray and 4k films on for best quality, I also allow about 4 homes to connect to my server to watch my library. Would I see a benefit starting to add Exos drives on a SAS card? I have never used sas and have no idea on protocols, initially I would put two 10 or 12 TB drives in but Exos drives say either 7E10, X18 or X24. there are videos comparing Exos to Iron Wolf Pro but I can't find one telling me the difference between these. Could you advise on suitable hardware if SAS would be better inc add in cards or would Iron Wolf Pro keep up with possible demand. When available I will be upgrading my internet from 1GB down 110 Mbps up to 1GB both ways.
Thank you for any help with my first steps in server grade hardware.