In Upper Manhattan, you are probably better off in the A Division, the numbered lines. Reporting locations will mostly be in the Bronx. Then there is also Main St, Flushing Qns, Flatbush, Utica, New Lots in Brooklyn. The B Division, as others have mentioned on the forums, is a huge world of reporting locations far into Queens and Brooklyn. Being Extra, you'll still only be sent to those locations in your division, just so we're clear.