I just ordered the Nathan women's Vapor Shape from amazon. It was about $120. I haven't gotten it yet, so I can't really give an opinion. But I bought it on the recommendation of another female ultra trail runner. The straps cut in to fit the shape of a woman.

I love my Salomon advanced skin s lab 5 set (say that 10 times fast!) I have the older model with the bladder, and the two main front pockets can each hold standard 20 oz water bottles as well. Great fit (they make an xs/s) and no bounce! They aren't cheap, but you can probably get one for a lot less than retail. They have it at running warehouse for 140 down from 195, and they offer free two day shipping and a 90 day return policy. If you look online you should be able to fid a coupon code as well. Good luck!

ETA As a nice added feature, the front straps are adjustable and can clip on in a variety of places above or below the girls. It is the one I'm wearing in my profile pic, and it is comfortable for 50+ miles at a time.