Welcome to TE.
Please go out and try a bunch of bikes to see what you like and what you don't like. Treks and Specialized are fine bikes, but there are others out there, too. Why are you wanting a woman's bike specifically? Are you long-limbed and short-waisted? If so, WSD might be just the ticket. But ride LOTS of bikes of all styles before you make up your mind.
Get the one that fits, because if it doesn't fit, you won't ride it no matter how pretty it is.
You don't mention where you live and what your terrain is like. There is a big difference between regular double chainrings and triples. If you live in a hilly area, you'll probably want a compact double or a triple. If you live in a flat area, a regular double will likely be fine.
While the components can be upgraded (for a price), sticking with Shimano 105 will probably be a wise investment if you can swing it. That's my opinion, others may have other opinions.
Now get out there and start test riding alot of bikes.