Originally Posted by
jimmytango
Unless you have issues supporting one, I'd say to get a nice bag. A reason for buying that bike was that it was sleek and lightweight. Racks and panniers are going to eliminate those features. Plus, a bag is useful for things besides biking.
A bag is a good option provided what you need to carry is relatively light and the distance relatively short. The more weight you carry and the longer distance you need to carry it, the more your butt gets hammered into the seat. Using a rack lets the bike carry the weight rather than your butt.