Where in DC? Most roads in DC are pretty tore up,so wider/puncture protected tires are a good idea. I personally don't go skinnier than 28mm. Also,are you commuting year round? The trails around here don't get plowed,so while we don't(usually) get that much snow,it's still something to take into consideration.
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C'dale BBU('05 and '09)/Super Six/Hooligan8and 3,Kona Dew Deluxe,Novara Buzz/Safari,Surly Big Dummy,Marin Pt Reyes,Giant Defy 1,Schwinn DBX SuperSport,Brompton S6L/S2E-X/M6L-X/S12 T Line
