I'd say hold off till you get here to NYC. If your building at work or whatever doesn't allow bikes to be brought indoors, then you'll need a beater or at least a very uglified bike. It doesn't matter what lock you have, if they really want it they'll take it, just depends on how long it takes. If you decide to get a nice fixie then i'd still look on ebay or craigslist and get a really cheap one that you can afford to lose.