NAS,
I support the idea of you buying and testing them out for the forum!
My truck has zero mods. I see a sump guard in the future but nothing super heavy. 60lbs seems negligible, but I would be talking from a position of complete ignorance as I don't have a clue.
If they would fit in the same space as the current spare tire, I would be really tempted to buy a set.
My biggest issue with the comps is mental. Besides the extra cash for a set of new wheels, if i was going to go that route, i know I would want to put beefier tires, which would require more cash toward an external tire carrier,...its a downward spiral for my checkbook and as I have never seen one in person, unsure of the look of the tire carrier...
The GY might be just the ticket. I had the silent armor's on my JGC (before it was lemon lawed...lol) and had no complaints except that I hear they wear quickly...