Hi all: I am a noob, currently riding an Electra Townie 21d for rides of 16-20 miles. I realize that for longer rides I am going to need something faster and designed for longer rides. I am also going to do a mini sprint tri and a sprint du next year and so would like a bike that will grow with me.

I am a 5'8.5", 225 (and losing!) athena, long legged and short waisted, and the LBS is recommending I test ride a Specialized Dolce. Anyone got any insights? Other recommendations? I would love to hear your thoughts.

Thanks in advance.