Not sure if you would be happy with the fit of the road shoes -- the heel cup will be wider than what you are used to & might cause you some slippage. Definitely a try-before-you-buy issue when considering a man's shoe last. I ride a man's mountain bike shoe for a winter shoe, but in winter I wear very thick socks & lace up tight around the ankles, no can do for summer. For summer I use the Sidi women's mountain bike shoes because the sole is stiff enough for me, but the uppers are soft, which is another place where I have foot troubles. My husband uses a carbon-soled shoe from Specialized & swears it is worth the extra $$ to have the stiffness. That shoe is too stiff for me overall.
One other comment would be about your pedals -- SPD's are a very small platform. I used to ride them & would get hot-spots on the balls of my feet on long rides. I switched to Time Attack pedals, which are a larger & more stable platform, kept my Sidi Dominators & have been happy ever since.



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