I would love to upgrade to the Revo 2's, but I think that they only come in a Load Range E, in the LT tire. (265/70 R17)
You could get LT255/70/17's, load range C, they are just a little narrower and a little taller than stock.
We have P265/70/17 Revo's (original, not 2) on our 4th Gen and are very happy with them. We are on our second set. We got 80,000 miles out of the first set and have over 50,000 miles on this second set.