If I make my own from scratch, it will be light weight, and much thinner than what other people are making theirs out of. Remember - in an impact, something's got to give. I'd rather it be the bumper than the frame. Most the guys making bumpers out there are making them from the same material you'll see on one ton, and larger, trucks. That's just too over-built for my tastes. Over built = way too much weight.
Then again - I love air time, and sand dunes, so weight is more of an issue to me than most people.