I would say a lot depends on how you intend to approach this particular style of shooting. I've experimented a bit with street shooting and found I prefer focal lengths in the wide-to-normal lengths. 24mm-50mm works well for me on a full-frame body, but that's because I like getting in the thick of what I'm shooting while maintaining some environmental context whenever possible. Typically speaking I found shooting wider, with a deeper DoF and a high shutter speed was the order of the day (ISO be damned!) typically speaking, but there are always exceptions. I also found I much preferred prime lenses over zooms because it's just one less thing to think about when something amazing is about to unfold in front of me.I intend to do more street photography I already have a 16-85 lens, do you think I may need a little more reach ?