lol...forgot to repost after I finally had my tires changed.  In the end, I made it to 37k miles on the factories.  Had free tires for life from the dealer, so I let them worry about it.  Apparently, the factory tires were discontinued, or something.  So they mounted four new tires they ordered from somewhere.  Like I said, they were free, so I really didn't care what went back on.  As long as they were within specs.