Thanks for the update on the M/Ts !
For us, they are the logical choice (diameter, price, sidewall protection, etc.), but I am still fascinated by the M-55s... I think they might offer a little better performance on snow and ice, but one big concern is sound.
Thanks also for the real world info on the M-55s at work. That's good news. Did the guy happen to mention anything about the sound (noise) ?
There is a spec sheet on the M-55, on the Toyo website, similar to the one posted above for the XPS Traction. Interestingly enough, the XPS Traction is one of the "target" tires listed.
From what I recall reading, the XPS is supposed to be constructed internally in the way that the XZL is built, but with more of a real world, on-road, livable tread pattern (obviously ;-). I agree that one would think that the all-steel casing should provide a greater measure of toughness. If Redline (James) should spot this posting, I think he might have some worthwhile comments.
If you have a Sam's Club membership (maybe Costco, too ?), I also recall reading that the XPS were fairly easy to find through there and that the pricing was better (?). They are supposed be very tough and strong, at least from what I have read on the big pick-up forums (hauling big horse trailers and good traction in muddy fields, etc.).
If I had your gearing (4.11 vs. 4.56), I would really give them a look, as I think that they would not only be quite tough, but quiet, too. I have however read that all-steel case tires require different handling for punctures and such, but that might be hearsay ?
Lastly, someone, somewhere mentioned reading that Ho from Expedition Exchange has a set on his D2 Land Rover. I think he posts here occasionally. Maybe he will spot this post...
Hope this helps.
Frank