I don't know what body you plan to use, but getting a second body is useful if you do night photography a lot.

If you want to capture moving objects like passers by, there is nothing better than TMZ (35mm) or Delta 3200 (120). Id use these films at EI 1600. These films are not very useful if your shutter speed is longer than a couple of seconds.

If you are mostly concerned about stationary scene, Id use Fujifilm Acros 100. This film has very little reciprocity failure so that if you use long exposure this is the fastest film available. I often expose Acros for a couple of minutes in dark scenes.