Keep in mind, the Amigo pictured above has rock sliders with steps built into them. Rock sliders come in a multitude of styles, are stronger & provide body protection. IMO, even if you don't 4 wheel, rock sliders are the way to go because they're stronger and more unique. Of course, nerf bars are cheaper, lighter, and usually work better as an actual step. I'm not sure if the Amigo pic was an example for the step bar or just the paint job.

I have rock sliders from a wrangler TJ and the length is perfect.