All be danged, this rig looks familiar:
I'm a plate bumper guy as it just seems the tube bumpers don't look finished to me, but I have one built, so I am just throwing out my $.02 for you guys to consider.
If you want to get pretty serious into rock crawling, you want to follow the "high and tight" principle. Having one hang way out there will cause you to not even be able to approach some rocks.
here's mine, (man I need to get new pictures of it!)
Plan to add some tube to protect the winch.
As sbolt and soco said, you want to build in some sort of attachment point, be it a receiver or a nice d-ring or holes for a clevis. Winch or not?
If you start with something like a 2x6, you can cut wedge shapes out of it to get it to bend how you want. But do so in a manner that leaves the radius of the tube in there. For instance, this guy just cut off the triangle all together and that makes that leading edge very square. But if he would have started his cut behind the radius he could have bent that radius back into place and would have looked much more finished.
But you have to make your bumper wider than you thought because when you bend the front piece back into place, it won't meet the end.
J.D.