I had the LTX 305/50x20 tires on my 07 Yukon XL Denali, and I loved them. Quiet, beat any winter weather NH could throw at them, great handling for a truck, and after 35K miles, they were less than 1/2 worn.
Then, I did something stupid and crashed into a stone wall and blew out the sidewall on one of them. So, now I have the LTX2 tires in the same size, and they seem to be just as good. I am concerned that the Traction rating on the LTX2 are B, while the Traction rating on the LTX were A. A small sample size for driving distances, so far, so my opinion may change in the warm/hot weather, but I don't think it will.