I am building my own bumpers but, if I was to buy them, it would be a Shrockwork front and CBI rear. I love the rolled over top end of the Shrockwork front. The CBI rear seems a little cleaner, to me.
Like others have said, it tows fine.. much stronger than the stock set up because it has more bolts holding it to the frame and it's stronger construction. I have to use a drop hitch with mine too for any normal trailer. I recommend going with the higher tire set up if you will be off roading a lot. My tire sits high and I've still rubbed it on rocks and even the ground on really steep stuff.
Well, the triggers been pulled and a CBI rear bumper is on order. The bumper is being prebuilt to accept a tire/fuel can carrier later on down the line.
On the deciding factors was the location of the hinge for the tire rack since the CBI's is tucked up on the bumper where the Shrockworks is sticking out from the bumper. I'd be afraid if I came down hard enough that it might bend. Plus, I like how the reciever is tucked under the lip of the bumper.