USPS PO Box or Private Mailbox PO BOX?

Greetings,

I've read that it is a good idea to use a PO Box when ordering seeds. I'm looking for advice about whether to rent a standard USPS PO Box or a private mailbox at a place similar to Mailboxes, Etc, QUICK PAK and SHIP, or similar facility.

Any thoughts on which would be the wiser approach?

Thanks!