I wear a Sherwood Solaris women's BC.
I'm 5'3", 134 lbs, with narrow shoulders and a small chest (sounds hot, huh??). I bring this up because rental gear never fit properly, since the chest straps didn't fasten tightly enough (so the BC would shift around my shoulders). The other problem with rental gear is it typically requires you to wear a weight belt (verus weight-integrated). Since my torso is so short, my BC covered my entire weight belt, which is not the safest situation if I needed to quickly remove weights.
My husband bought me the Solaris as a wedding gift since we went to the GBR on our honeymoon. What a godsend! It fit securely since it's designed for a woman's body, and weight-integrated so no need for an uncomfortable weight belt. Also, it has this great neck roll along the top, which sounds odd, but it's more comfortable than a traditional jacket. It back inflates which has helped my bouyancy (I've only logged 25 dives so far), and is more comfortable because I can still access my front pockets, even when inflated.
You should go to a dive shop and try different styles on before choosing. Women's bodies vary so much that you have to make sure to get a personal fit.