Help pick a CPU for a home NAS running file and backup services, possibly Jellyfin

[georgios]

Hi. I'm looking to build a home NAS for the following requirements and I want very good speeds:

• 4x 10TB
• I don't want to be limited buy the CPU, only HDD/raid speeds
• Low power consumption
• Diverse file serving needs: afp, ftp, iSCSI, NFS, rsync, SSH, SMB, WebDAV etc
• Backup services for Mac, Linux and Windows
• Capable of running TrueNAS virtualized, inside Proxmox
• Capable of running Jellyfin (no transcoding, direct play only, max 2 clients)
• I have a seperate Proxmox machine running containers/vms that will connect to the NAS

Is a C3558 good enough for the task or would a C3758 give me better performance? Maybe, alternatively a i3-6300?