Recently I took my girlfriend bike shopping. I have a simple philosophy when it comes to bike buying, which I've often espoused here: ride everything, buy the one you like.
She tried lots of race bikes, but ended up buying a Marinoni Sportivo, because it felt the most 'stable' and controllable to her. Maybe look into something with similar geometry.
http://www.marinoni.qc.ca/Html/Sportivo.html