Best national tire chain to buy 6 new tires?

Cheryl, I am so sorry that you have been way overwhelmed by all of the back and forth and trying to cram a butt load of info into a forum like this. My suggestion would be to ask locally as to an experienced and trusted truck tire shop and then go see a couple of them. Explain your concerns from your readings here, or better yet let them read the thread. Just don't stand near the line of fire if they are eating or drinking anything as you may get sprayed. First off they can provide you with options from several different lines to choose from and secondly but more importantly, they know truck tires and can probably provide better explanation in person. They can also hook you up with a nationwide dealer network for service and repairs. They can provide the list (website) to locate them and it is also nice to have that listing if you have a roadside plan as if you have to call, one in the tire makers network will also probably by in the roadside network. Also, don't forget about the spare. If you don't have one or it is aged out then they will probably have a take off that will work fine.

I hope I have been able to help rather than to confuse.