If you're using it for commuting, consider a hybrid. Flat handlebars are easier to use in urban environments than drops, and at least where I come from, a hybrid is less of a thief magnet than a road bike. They also often have better tyre clearance, so you can fit wider, comfier, more durable tyres, and they often have better brakes than road bikes, which is important if you're riding in busy areas. Road bikes are fast and they look awesome but if you are going to spend a significant amount of time on urban streets, there are better-suited bikes out there.
FWIW I think the term "road bike" is really rather misleading. "Road bike" usually refers to a dropped-barred bike with skinny tyres, a short wheelbase and fairly twitchy handling. They're also really only designed for high-quality roads - the smoother the better. Hybrids are also really only designed to be used on roads, but they're tougher and easier to ride. Also, road bikes are generally less able than hybrids to withstand the rigours of being used in wet conditions, so that's another reason not to commute on one.
