Just in case (I often can't revisit threads for a day or two, plus there is value to non-OPs in these types of threads): I vote that you buy the new bike if you are ready to do so, then invest another $60 in a single speed drive train (rocket ring ($18), KMC chain ($8) & Nashbar single speed kit ($30)). Run the single speed kit drivetrain through the winter then gear it up in the spring when you want to push a little harder. Every winter, simply put back on the beater singlespeed drivetrain.