Ask yourself a couple of important questions. Do you haul lots of stuff in the bed that in the event of a sudden stop could come through the back window? e.g. ladders, wood, tools, etc. If you do, then a headache rack is almost a must. If you just want something for looks or to hold a few off-road lights, then the 'roll bar' is the way to go. And just remember, they may be called roll bars, but by design of the trucks, they don't do squat IN a roll over.