If you're looking for a bike to lock up in NYC, I'd vote for none of the above and look for an inexpensive road bike that has been converted to a fixie. The Mercier Kilo TT gets some love on your poll probably cuz of the nice frame tubing (Reynolds 520). If I were looking for a fixie commuter, I'd go with a bike that can take fatter tires since that will make the bike more comfortable and help the wheels hold up. Take a look at the FantomCross Uno and Windsor Timeline. I've been thinking about picking up the Fantom Cross Uno; that's a way cool bike.