Here is a picture of my Expedition One rear bumper, which is aluminum, and weighs 35 lbs. It is combined with a Teraflex aluminum tailgate hinge and tire carrier, for a light weight and uncomplicated set-up.
I have a friend that bought the AEV bumper and tire carrier, and it is HEAVY! Plus, the AEV bumper and tire carrier could easily win the Rube Goldberg award for most complicated bumper and tire carrier ever designed. My friend was a little underwhelmed with his.