Are you planning to go pick it up yourself? I wouldn't trust a shipping company with that rig. I can guestimate about how much you're paying for that beast, and you couldn't convince me to put it in the hands of any of the carriers.
If it's unavoidable, I would do overnight shipping just to minimize the chance that some boob is going to drop it from about two or three feet off the ground.
Perhaps something to consider, coming from a guy who sees all sorts of shipping abuse to machines.
There's no way I'd let UPS, Fedex, et al touch this beast. For extreme rigs like this AVA insists on shipping it on a pallet by truck. I've waited this long for the build to be done, I can wait a bit longer for careful and secure shipping.