If you have two new Transforce and only want to buy two more, get two more Transforce and run them on the rear with the two you just got.
If you want Michelins, get four and run them on the rear. Move Transforce to front.
Do you have a spare? If you do, should be "in date" (let's say 5-6 year Born On Date.
Nothing wrong with Transforce or Michelin LTX. I like the way Michelin warrantied so many LTX a few years ago. I remember how Firestone cheaped out on their responsibility for some of their passenger car tire failures years back. I don't know a thing about Hibdons Tire, but can say I've found Discount to be a very easy place to deal with.
Be sure you get good metal valve stems. 2" in front and spare. They can be ordinary stems. For the rears, get Dually Valves. Camping World has good pricing on them and runs specials besides.