collector- just reread your intended usage in your first post. Honestly, if you want a *softer* ride for more comfortable highway performance, I can't think of a better tire than the original Michelins. If yours are worn, a new set would be great. I have a '97 Lexus LX450 with the softer suspension and it has the infamous side-to-side swaying problem due to softer shocks (the LC does not have this problem), and the Revo's stiffer sidewalls almost completely fixed this problem for me. But the ride has gotten stiffer and you can definitely feel the bumps more and hear the tires a little bit more than the Michelins. Keep in mind that the Revos are known for their comfortable ride and quiet highway performance in addition to being a decent A/T tire offroad, so I'm willing to bet any of the other tires you are considering will just be worse in terms of ride comfort. If I were you, I'd just stick with the stock size Michelins.
People here generally like bigger tires because they provide additional ground clearance and better traction for offroad performance, and some like them because they "look cool". Especially considering you'll be using your rig exclsuively on the highway and not offroad, and as a family hauler, the stock tires are the safest (less chance of rolling over with stock tire size), they are probably the quietest tire you can get for the LC, and they will provide you with the most comfortable ride IMHO.
People here generally like bigger tires because they provide additional ground clearance and better traction for offroad performance, and some like them because they "look cool". Especially considering you'll be using your rig exclsuively on the highway and not offroad, and as a family hauler, the stock tires are the safest (less chance of rolling over with stock tire size), they are probably the quietest tire you can get for the LC, and they will provide you with the most comfortable ride IMHO.