I’d say the Michelin ltx m/s are probably the best of those choices. Is Costco just for convenience? I’ve just today finished paying the price for not buying tires from a local shop. 3 years ago I bought a tire/wheel package from Discount Tire Direct. Seemed great, tires came mounted and balanced, just had to put them on. Fast forward to a week ago, when I noticed that 3 of the tires had significant dry rot on the sidewalls.
I called Michelin about their warranty and they told me I had to get a local tire shop to do an assessment and call them. They gave me a list of five places. Not one of the 5 were willing to look at tires they didn’t sell. Apparently after big box stores started selling Michelins all the little guys started getting screwed on warranty work because the big places will not do it. Next Michelin tried sending me to a truck center that sells their tires, I refused because chances are the place that mainly does dump truck tires isn’t going to have the right equipment for a Challenger.
In the end, they gave me 75% towards new tires that got put on at a Ford dealer yesterday. Their tech apparently couldn’t figure out how to do an alignment though, the numbers on their print out are all over the place.
Long story short, you’re probably better off paying just a little bit more at a local shop and having service available if you need it.