So i just moved to nyc and i would like to find a decent single speed bike which would allow me to commute to work with ease. I currently own a Giant road bike (cf frame) and i dont think i want to park it outside and leave it there. Its just too much of a risk. I am looking for a bike around 200 bucks that will get me from point a to point b. I would like something simple like this (http://images01.olx.com/ui/3/99/60/58419960_1.jpg) (random pic off google).

Simple frame
single speed
flat bar

any suggestions?