First post!
I picked up my Sierra about 3 weeks ago, and read all 74 pages of this thread trying to decide on nerf bars.
Ultimately I went with the Westin HDX Drop Steps. They were waiting on the front porch when I got home tonight, and took less than an hour to install. I'll have to wait until tomorrow to post pics, it got dark on me and the cell phone just won't pick up the black on black. For now, you'll have to take my word on it that they look great!
Now to figure out how to get the wife to let me buy a Tonneau and new tires...