I have a set of 30x10/15 Mud Rebel RT's, and a set of 28x10/14 Ripsaws on bead locks. The Mud Rebels seemed pretty good all around, but I prefer the Ripsaws, they are a little heavy, but they chew and sling some serious dirt clods with great traction, and do well on hard pack as well.
I have the 708 gen 1 machine, and it turns them both over just fine. If I had it to do again in a 28" tire, I would go 9" instead of 10" to save a little weight. A 10" tire on a 28" rm just looks a little too wide to me, The 10" in the 30" tire looks more proportionate. My riding areas are mountains and high desert, and the Ripsaws have served me well.