For what it's worth: Purchased 6 Samson tires 2 yrs ago for our DP. Dealer said a lot of OTR trucks were using them. Only have approx 6K miles on them, but so far no problems, rides and drives same as the Bridgestones replaced because of age.
Tires are the last place to cut corners. I have not read anything good about tires from China and many have had problems with them. I would stay with a well known brand, and verify that they are not made in China.
Remember, if one of the tires blows up you will cause a ton of damage to your MH. Safety first.