Lew, don't know if you have a Costco nearby, they may be a few dollars cheaper and they have the lifetime rotation and repairs included. I just had a bad dealing with Goodyear, anything other than manufacture defect, they are not warrantied without buying an extra plan. I've had Michelin on all my other trucks, I'll be junking the goodyears next spring.
I believe the new Defenders are an upgrade to the LTX MS/2 series.