I don't have any personal experience with the kmod, so I can't say anything about it.
But I have been running the new redesigned Timbersled Mtn. Tamer on my 2012 pro rmk this season. I'm running 10.5 #s. I do a lot of technical boondocking, deep snow riding, and have hit multiple 100+ foot cliffs with this setup. My shock choice is EXITs, because of their great ride, toughness, and their great tunability. The suspension has handled the jumping extremely well. It's designed and built very strong. My favorite feature is the coupling adjustment knob. It is so functional! No tools required, and I can make the adjustment in literally 20 seconds. Most of the time I like having ski lift for agility purposes with my sled and the ability to wheelie over or around obstacles. But when I need to climb something, or get out of a nasty tracked up drainage where control is essential, I make the necessary adjustment. Highly recommend the Timbersled!