I used Uship to deliver my Vandy 3a sigs. It was easy to set up and the delivery went smoothly.
I work in the shipping industry as a truck driver. I assure you that you will find some shipping options cheaper than others. I can also assure you that the cheapest ones are most likely to destroy your freight. They will probably even give you a hard time when you file a damage claim. I would talk to some freight brokers at length, discussing not just shipping cost, but also insurance, willingness to honor a damage claim, reputation etc. I myself will not offer my opinions on who to use. That would make too many people in my field unhappy. You want absolutely guaranteed damage free delivery? Rent a trailer or a small truck.
Pick up only , if in New England or big city by far the best way to go
prices are out of hand in both ups may be a little cheaper
you did not say ,stand mount ,or floor stand ,and size, weight ,weight is where it gets costly 80 lb each speakers , can go vary greatly
if you are on the east coast ,how far ? East to west coast $600
if on a pallet a trucking company where speaker is going, size and weight .