You might find some groups on Tumblr or Flickr that show the kind of images you like and check what type of film is mostly used.
This is what I do when I want starting tips for a new film in a new setting.
I have seen some nice street photography lately on Tumblr, mostly shot with Kodak Portra 400, when I liked the colors too.
I think that - next to film - your choice of lenses is important too.
Good luck hunting and show us some images when you're done.