RCN Cable Modem vs. Time/Warner's Road Runner?

Jeffrey Altman asks: "I'm moving into a new building in the middle of Manhattan which has been wired by RCN and Time Warner. I would have figured that I would have the full selection of choices available to me when choosing Internet access. However, that is far from the truth. Since RCN wired the building for telephone service, Verizon is unable to provide telephone service. This in turn has ruled out the ability to use any DSL service since all of the DSL providers must use Verizon-owned lines. (RCN is not required to allow third parties to use their internal wiring.) I would have prefered DSL, but I am stuck with a choice between RCN and Time Warner. Does anyone have any recommendations for which to choose?"