Nick, your Tammy 28~75 is an EXCELLENT lens to be taking to NY, it will serve you well for random street photog (and other shots) throughout the city. Now, as others have mentioned, you would also want to take something wide with you - the absolute perfect match would be the Tammy 10~24, that would give you a total coverage of 10~75 which would probably cover practically everything you would shoot in NYC (except for the 1 out of 1,500 shots where you need a longer telephoto, you know, something a far floating in the harbor, etc.)...