I only have experience with the KM2's. I have enjoyed them. I have had them in both 35 and 37. I currently run 37's. If you take care of them and your setup, they run the same on the road. But any tire that large (35 or 37) are hard to keep running well on the road if you wheel them. One trip on the rocks will take them out of balance. I used to run beads in the 35's. They did good for a while, but after that, they didn't help much.
Also, a side note, I have never ran them but have always thought the Mickey Thompson Baja Claw looked like a nice tire. Maybe someone has some experience with it.