My vote:
Airborne first
FedEx second.
UPS is damage prone.
Go online, plug in the zip codes, package dimensions and weight and choose your speed and voila! You'll get an idea of what the price is. If you know of someone who has a FedEx or Airborne account and ships a lot with them, see if they'll let you ship it under their account. You can save a lot of money that way.
Whatever you do, don't ship it via common carrier, stick with one of the integrators, FX, AB, UPS, DHL, etc.