Just occurred to me... the Jamis xenith comp has a women model with shorter top tube - one of the girls that rides in my boyfriend cycling club owns that bike, and she tried a million bicycles before finding that one that fit. She is about 5'8" if I remember corectly.
Here are the specs: http://www.jamisbikes.com/usa/bikes/...ithcompf.html#
I think the stock version comes with Shimano but it's really cheap - so if it is a good fit you could just buy the frame and fit it with chorus or record.