If you are well endowed, seriously look at a back plate. I have a number of female friends who had various BCs designed for women and all preferred the freedom for the "girls" when they tried the backplates. Forget the fancy padded harnesses, go with the plain old webbing. If you are short, a smaller plate will fit you nicely. If you don't want a hard plate, there are some soft plate options available, but I find the hard plate is a much more stable platform.