I posted this elsewhere, but it bears repeating here, I think: taller women, especially those with long legs and short torsos, do just fine on men's stock bikes as far as reach goes. The top tube lengths on larger bikes are shorter, relatively speaking, than those on smaller bikes, for geo. reasons.
Usually, the problem (if there is one) is that the front end of the bike (your "grip height") is just too low, and all the hi-rise stems and spacers don't seem to give one a comfortable position. Women, not all, but most, do tend to appreciate a bit less drop, i.e., less differential between the saddle height and handlebar height, especially in the larger sizes. I am getting a lot of orders these days from taller women facing this issue.