I rode a Trek 1000, 50 CM, for 2 years just fine. Many of my rides were an average of 40-60 miles.
I am 5'4" with a long torso and short legs.
It's a good solid bike, and just because you are a women does't mean you necessarily need a WSD bike.
I recently bought (well, got it as a gift) a Specialized Tarmac Expert, 49 CM. Fits me just fine too.
"Life is not a journey to the grave with the intention of arriving safely in a pretty and well preserved body, but rather, to skid in broadside thoroughly used-up, totally worn out, and loudly proclaiming: WOW WHAT A RIDE!!!!"