Torn between getting Michelin Premier AS from costco or Goodyear Assurance Weatherreadies from a good year shop. Costco has a great warranted and will prorate tires if they are damaged from road hazards. But the problem is that the Michelin Premiers kind of suck in regards to tread wear. My 16 XT had its Premiers for 30,000 miles and it already needs replacing. Is service at Good Year shops on par with Costco? What would you guys do?