Another thought, tires like Super Swamper TSL's/Radial TSL's are really great tires and can really grab.
But, tires like thouse can help break parts. Especialy things like that alu. front housing and stock CV axils. I know I brake the axils enoff with my MTR's.
If your spining in some mud and come upon say a rock, log or fresh dirt, the tires grab and "snap" there goes another part.
I find that the MTR's give me just the right amount of grab but yet not super hard on the parts.
Like I said earlier, they grab the best over rocks, but you dont get that tire spining/grabing shock that you can get in the mud.