All of you are exactly right, most LBS do not stock highend womens shoes... not enough of a demand quite YET. With that said, I find that there is a hUGE difference between a carbon soled shoe and a nylon. I ride both road and mtn, and find that I climb a fair amount while standing(road). With that said, it definitely starts to wear down my shoes enough that my feet start to hurt, simply because the sole has broken down and isn't supporting my feet any more. (If you were to look in my closet, you would find several road shoes that look like they are in great condition still, but have the cleats taken off and are simply taking up space because of this) A carbon sold shoe( at least for me) will last longer, and give better support throughout the life of the shoe.

Another point that I want to make about good shoes is this: your feet are the foundation for the rest of your body. If your shoes are inadequate, then any issues you may have, then can manifest in your feet OR further up your body over time. My theory has always been buy good quality shoes, and save money in other parts of your cycling wardrode... less expensive jerseys etc... I have a feeling that if you ask Knotted or any of the other PT'S online here at TE, they will share that same thought.