I have the Aries bush bar, and I like it. It bolts to the frame at the bottom and can take some impacts there, but there are no anchor points above the bumper so it does have some play up around the grill and lights.
You can check it out in my build thread how it looks http://www.forum.ct4wd.com/showthread.php?t=1579
After having it out on the trails it holds up pretty well, but comparing it to the after market bumpers if you want to protect yourself, get an after market bumper.
I know a few guys who have hit things (trees, deer, mustangs) with the All-Pro
bumper and they and their trucks have fared really well. (I will be upgrading to either a All-Pro or Relentless fab bumper in the future). If you want protection get a bumper.
There are lots out there:
so dependent upon the look, you got lots of choices.