Concept was originally offered with a choice of wings, and a choice of weight systems.
I dive a Concept with 35lb wing and velcro front weight pockets, and dumpable rear weight pockets.
I can put one weight in each back pocket, wear one weight on a belt, and use the front pockets for storage of safety / backup equipment. I am thinking of adding Fastex buckles to the pockets.
I would recommend the original Concept like I have, but I believe Zeagle no longer offers it. If I am wrong, feel free to correct me.
If any diver of any size has a problem with proper fit, try a Concept. It comes in two sizes. You may think this would make it more difficult to fit, but they are designed to fit any body. Concept is composed of sections that can be adjusted, so that the length and width of the BC can fit the length and width of the torso. In other words, you can make it longer or shorter, wider or narrower.