Ditto everything that has been said, with an emphasis on fit.

I am very close to you in size. I rode for several years on a (man's) LeMond. I loved the bike, but I always had neck/shoulder pain. We moved, and when I started really riding again, my husband took the bike and me to a guy at a LBS that he had come to trust. The guy put me on the trainer for a while to check the fit. He recommended yet another stem--longer, I think--and said that it would be the best we could do. (He was not trying to sell us a bike, honestly.) So hubby said I could get a new bike for my birthday. I tried out a few and ended up with the Specialize Dolce Elite, which has compact geometry. I have loved it and have been riding like crazy ever since (Feb. 2004). And no more neck/shoulder pain.

Bottom line: Find someone you trust to check your fit. We thought the guys at the bike shop that sold me my first bike knew what they were doing, but they didn't, and I didn't know any better because I had never ridden a road bike before.