Nitto RG will go 50K+ mi, so that is a plus for them. They are heavier than the KM3s. They are very quiet when newer, but get louder at 40K mi. I've never had the RTs. What is your impression of them? I will need new tires in about 2 mo, and the Toyo RTs are under consideration, along with the Yokohama X-AT (a new hybrid) and the Yokohama Geolander G003 MT.