The LTX M/S are legit quality tires, highly recommended by those who spend most of their time on pavement.
I've heard many arguments on either side, ST vs LT. I really don't know.
However, 65max is no good, especially where we live. That makes me wanna check my sidewall information. I do check my sidewalls when I stop and haven't noticed a lot of heat.
Best tires I ever had were the car tires that came on my 16' PJ (trailer bought used). Lasted forever, trailered well, good ride, etc. I've had pretty good luck with trailer tires though.
I just read through the article in the link and it reads pretty well, and consistent with what I have read before. The "add 10psi" to get to 75mph is good info though. I will check my rims for max psi.