I've bought at least 8 sets of tires from Tirerack over the years. Look at their preferred installer list for your area. Warranty is on the tire and Tirerack will work with you to get BFG, Goodyear, etc to peacefully resolve. You're over-thinking again.
Have you considered 295/50R15's?
LOL
Just that I've "been there done that"......seems like when you go somewhere for warranty service , you always get better service if you bought the "whatever" there first. Have had third party situations like this (car warranty comes to mind) and it was a PITA to get a local dealer to broker the relationship because I bought the car and warranty at another dealership miles away.
Chances are very good that the year part of the tire warranty would expire before the mileage part, so its force of habit I guess.....but still I like to give as much business to local folks if I can.....
In any event, tire rack says the 235s are backordered....plus the extra $20/tire. Grrrrrrrrrrrrrrr.
Havent heard back from the dealer yet....hoping he can make it work....
There is another chain place localy that has the tires advertised at $147 EACH (versus the $97 at Firestone)......ouchie.