I have Marathons on my TT and after over 15,000 miles they still look good. But mine were made in the good ol' USA, not China.
There's a small amount of sidewall dimpling, but as was said before, I don't think that's a durability issue. I'll probably keep them on for another 5000 miles or so before I replace them.
2011 Dodge Ram 1500 HEMI Quad Cab
2011 Jay Flight 26BH