My husband had the Madone5.9 for two days before he retrieved his bike and loved it--he could hardly stand to return it. Colnago's sure are pretty, but our LBS calls them garage art and tell the story of the tiny rider (5'4, 115lbs) who had to deal with 4 broken Colnago frames in a year.

Personally, I think a princess deserves nothing less beautiful than a Columbine. Though it might not be in the right direction if you're looking for something light and zippy.