Your chain is one of the most important components of your bike. It is literally the only thing between you, your bike, and control. If it breaks, or the tension is off, you very well may be freewheeling into a disaster. That's why we would cop one of SRAM's durable PC-1 chains. They're affordable, built to last, have double corrosion resistance, and a snap-lock connector that makes it easier to clean.
SRAM PC-1 Single Speed Chain
Buy It Now at Performance Bikes, $15