Hi guys. I'm taking a trip to NYC in a week, and I'm looking to upgrade one of my lenses. My current kit is a 60D with a Tamron 17-50 non-vc, Canon 50mm 1.4, and a Canon 70-300. I'm thinking about either upgrading the 70-300 to a 70-200 f4 IS, or adding the Tokina 11-16 for a UWA. However, I'm thinking that the 17 will be wide enough- not true? Or replacing the 70-300 with a 135L, for candid street portraits and as a general telephoto. Plus, I love the bokeh, and I'm going to be outdoors most of the time anyway, so I'm thinking it won't be too long. Which would you recommend I get? Thanks!