Upgrading to new hardware for TrueNas

I’m getting a completely new hardware setup from 45homelab soon and purchased new hard drives (5x24tb) for it so that I can have something completely new. What is the fastest and safest way to transfer my data from the old system to the new system? I considered replication, but is that the best approach? I want to ensure everything is verified, copied, and done as quickly as possible. I plan on shutting down the old system once the transfer is complete (I already have a Synology NAS as a secondary backup destination).

IMHO and afaik, absolutely yes: replication Is what you need.
Is how in the past i migrated data from one pool to another (after a pool layout change) without any issue, and Is actually what I use for backup my data.
Be sure to flag recursive and full file system replication, and if you upload your old config backup from old Nas into the new you inherit everything (share, permission, ecc ecc)

Excellent. Thank you.