It depends...If you are running 05-08 plastics, then the Treedog bumper is by far the best choice. If you are running 09-10 plastics, then the Cobe bumper from Fastrax would be the best choice. The stock bumper on an 09-10 would be my second choice. I own a skinz bumper on one of my 09's.
If you look at how the Treedog attaches compared to the skinz bumper, you will see that upon a medium impact, the bumper will push up in the Y direction, then in the X direction right at the hood, pipe, etc. The treedog bumper due to it's mounting design will keep everything out in front. I've seen major damage on a sled during a pretty minor impact result in major damage.
I also watched a 900 flip endover 6 times with a treedog bumper of the rocks and beside bending the bumper, the only thing that happen beside a little plastic cracking was a broken master cylinder cover.
I've installed about 6 or 7 of treedog Toby's bumpers.
