I can't speak about the ATs... but I've heard nothing but good things about the MT 834 (equivalent of mine) and the KL-71s. When I got mine I just kind of went out on a limb, because I hadn't really heard of them, but they were way cheaper the BFGs. So I did it, and haven't regretted it once. Mine clean out well in the mud and do pretty exactly what I'd want (they could maybe ride a little quieter but can't win them all). I know Aaron (red_ak_ranger) likes his and they are the same tire as mine, and I think Travis (l2en) is running the KL-71's and said he really likes those.
I would say give them a shot cause I know Kumho makes a pretty good tire in the MT department.
Sorry I can't be of more help directly on the tire you asked about.
1999 Ranger XLT -- "Project Unknown"
2010 Subaru Impreza -- "The Daily"