I see that you are looking for a weight-integrated BC, so my comments don't exactly apply, but since I had so much trouble finding something that fit, I thought I would pipe in (even though I did not end up with what you are looking for). At least perhaps it will give you another option if you don't find a weight-integrated one you like.
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I couldn't find a BC to fit me, even after trying a half dozen or more women's models. I'm not large on top but I'm very short waisted, and so I had two problems:
1) Because the bottom of the cummerbund would end up at my waist (seeking narrowest area), and because the cummerbunds were so "tall," the BC would naturally sit very high and the shoulders would be up around my ears instead of on my shoulders. This was uncomfortable and the tank would end up being "shifty."
2) Also because of being short waisted, I ended up with too much puffy fabric bulk around my front and along my sides under my arms, and I felt like the Michelin Tire Woman. The back inflate BCs were better, but still had a lot of large pockets and tall cummerbunds (the ones I tried on anyway - I did not try on every one in existence so there may be some that fit - see my note on Zeagle below).
I ended up going with a backplate and wing setup, and I love it. It's very comfortable for me, there is not a lot of extra fabric and whatnot bunched up in front of me and under my armpits, the waistband is narrow, and the crotch strap keeps the whole thing from riding up (I have hips, so nothing is going downwards, but it can all ride up). It's also very adjustable if your size or shape changes. I'm also pre-disposed to like the basic/spartan/functional modularity of it, which you may not be.
What I did was rent one on my first dive trip last winter (from Silent World in Key Largo, FL). Once I knew I liked it -- and before going on my second dive trip a couple of weeks ago -- I ordered my own. Boy, what a joy it is to have my own BC that fits, and that is adjusted the same every time (unless I change it). No matter what you end up with, I bet you are going to love having your own gear. I knew that rental gear was wearing on me, but I was amazed at how much stress dropped away once I had my own gear.
Because I had only dived twice after being (quickly) OW certified in 2005, I took another OW class along with my new-to-diving dive buddy last December. I wore the rented backplate and wing. I mention that because in the class I went through the doff-and-don a number of times. That particular backplate had the one piece, only-one-buckle-at-the-waist harness, and I wondered how that would work. It was fine. In fact, it seemed almost easier because it was so straightforward and the webbing is stiff enough and arranged in such a way that it kind of holds its shape when you remove it. Prior to that if I had ordered I probably would have gotten one of the more "deluxe" harnesses with more buckles, but based on that experience I got the basic one. I'm not super flexible and have had a couple of shoulder injuries in the past, but of course the more buckle-ful harness might be better -- just depending on the person.
The plate looks very industrial and "bare metal-ish" and like it would be very uncomfortable, but I have not found it so. Last winter I wore a 3mm wetsuit, but on this last trip I wore only a Lycra dive skin, and I did not notice any discomfort.
In summary, I don't know how your shape compares to mine, and or if what works for me would work for you, or if you would even like it -- but I was very happy to find that the backplate and wing fit me. Finally! So I thought I would mention it as an option and tell you a little bit about my experience.
Blue Sparkle
PS: In the more "vest" type of BCs, I understand that Zeagle makes quite a few that are sized more for women. My dive buddy (male) bought a new Zeagle BC before this trip and the fit and finish were quite good - including that you could "permanently" adjust the cummerbund in and out by moving some screw-like fasteners, which customized the basic size (in addition to having quick adjustments for everyday use). His is a Zeagle Stilleto. I also saw a Zeagle Zena (IIRC) that another woman on the dive boat had, and she was happy with the fit (although she was more the long-waisted and thinnish type).
