How should I ship these babies?

It is best to separate the two subs. It will keep the weight down and give you more options to choose which shipping service (UPS, FedEx, etc.) to use. I have taken a pallet and cut it in half and used it to ship heavy delicate items. It will keep the weight down and minimize damage. Shrink wrap items to the pallet and double box if possible. At this time of year business is booming for shippers and the priority is to get the packages to your door on time not in what condition.

Dayton Freight did a nice job for me. They delivered speakers (160 lbs each) to my house and I later shipped them out from my house just fine. The speakers were delivered to their new destination fine. They were double boxed. They each had a small pallet on the bottom connected to the bottom of the box and I used adjustable shipping straps to strongly secure them to the pallets(got the straps at Home Depot and they work great). So if you still have the pallet and can do it, you may want to cut it in half as suggested above, get the shipping straps from home depot, secure each sub to each half of the pallet and use a freight carrier like Dayton Freight to pick them up at your house. Bax Global does not do residential pick ups.

Dayton does not ship to the areas I'm interested. But thanks. The bottom line: looks like it (though a bit more expensive) will be UPS. The least problematic for residential to residential since that be what we are dealing with, here. with insurance we're talking $260. Not too bad...

I've used BAX for larger poundage than that & had them picked up at a friends' business & they delivered to the buyers residence.

Well, after doing oodles of homework, cheaper is not necessarily better as you all know. Also, many shipping companies do not have a track record that I'm familiar with. Also these babies are ridiculously heavy, and getting them to a friend's business is problematic and labor (and time)intensive. Also, the buyer wants delivery to his home. So? UPS it is. I have had perfect experience with UPS over the years. It is going to be a bit pricey: $270, includes insurance, pick up at my door (very good thing)and delivery to the buyers door. Thanks for your tips guys.
peace, warren