After much research, I ended up getting a set of Toyo Open Country AT3 on OEM 18 wheels. Like yourself, I don't intend to off-road much. If anything, I will occasionally drive it up to my cabin. I put emphasis on overall effectiveness, not just for ruggedness/offroadness. Where I live, it rains alot and when it snows, it's a real wet snow and so far, it been great. Minimal hit on mileage, only slightly more noisy and great under heavy rain and near freezing temperature. I also didn't want to spend $$$ on them and KO3, Wildpeak series are much more expensive locally. About the only other choice I considered were the Nokian Outpost NAT. Lastly, these Toyos are optional tires for the venerable GX550 when you opt for the Overtrail package. I figured a conservative automaker such as Lexus would do prosper research before opting to choose a set of optional AT tires (middle of the road, great all around AT tires they were probably aiming at). Hope this helps!