Just me and my opinions
MEFO Stonemaster, serious knobby, DOT rated, have not experienced it yet.
Terrorflex: rides like a truck tire (4 ply), really need to down pressure like CJ says. Crap hard terrain tire. Absolutely scary on hard surfaces like paved roads.
908: expensive, seems OK on hard terrain. I really don't like it much on my 690 when powering through corners, tends to hook up and release in a on/off fashion
TKC80: decent on road and off, side wall is flimsy, wear out quickly if you are hard on the throttle.