Thanks for all the good feedback! Hopefully the 2 ply doesnt give me any problems down the road, but if it does I suppose thats a good reason for new tires!
well, if the fact that it's a two-ply sidewall is what ends up giving you problems at some point, you will have pretty clear guidance on where to go after that. the list of 3-ply sidewall AT tires is much smaller than the list of 2-ply tires.
FWIW, I just went back to P245/75/16 Dynapro ATMs on my '02 Tundra, from C-load LT265/75/16 Cooper AT3s. I was never the biggest fan of the AT3s, from day one that I had them. A few of my issues were probably related as much as anything to going up in size (previous tire had been Dynapro ATM P265/70/16) as opposed to the tire itself. But, I knew I had been happy with the Hankooks, and you can't get them in a C-load LT, so I went back to the Pmetric tires.
I expect that, for what I do, I'll be just fine. My rough-trail adventures are, at their roughest, pretty mild (along the lines of Engineer Pass to get from Silverton to Lake City), and 99.6267% of my miles are highway driving. The Pmetrics will be fine for the load hauling I do, too.
I expect you'll be just fine with what you got. If you were outside the capabilities of that tire, you'd probably already know it (meaning: you would have enough negative experience to have made up your mind already).
-ben
edit: I should add that both the P-metric Dynapro I have and the LT AT3 I have are load 109. The sidewalls on the AT3s aren't too much more thick than the Dynapros, either, if at all.