i have the n-fab nerf step bars and like them (medical trouble)
i would think about why you want the bars first
if for wife/girlfriend well your decision ;-D
if it because they look cool then get them but
i know more than one person that has taken them off. they stick out and usually get your pant cuf dirty, and can be harder to get into the truck and out. and if you are getting them for door protection, well probably won't offer the protection you are thinking of.
nerf bars/steps/
running boards you have all kinds of options
the n-fab bars bolt up to existing cab holes i had mine on in way less than a hour if you call n-fab, talk to "missy" i payed more than most but i had to have them modified for me and they did it , and all the others just ask, black,chrome and credit card number