Even with the speed of your WAN circuit, I would try to do all restores locally. The latency on a WAN connection (especially with all of the files in a format=directory backup) is a concern. The outline of how I would do it are:
rsync or ftp the files to either the database server’s local storage or to or LAN-connected SAN/NAS storage
Given a backup server storing a "format=directory" database backup, and a database server, should I:
Option #1: run pg_restore on the backup server and "push" the data to the database server via port 5432, or Option #2: have the backup server serve the dump directory via NFS, and run pg_restore on the database server, pulling the data via nfs protocol?
(It'll be a multi-threaded restore over a 10Gb pipe.)