Any size speaker is easy to ship. First, take notes while unpacking. It will make packing months or years later much easier. BTW, only a complete idiot would throw away the original shipping cartons.
Strap each box to a pallet or both to a large pallet.
Set up an account with a place like this (what Legacy uses):
And Bob's your uncle.
BTW, not all Legacy speakers are big. As I type, I'm listening to a pair of Legacy Classic HD speakers. Speaker and listening position have been optimized. Preceded by reasonably priced, well matched components. Smaller room. The sound quality is sublime. Right now listening to Supersession; LP purchased over 50 years ago when I was in high school.