Comfortable, Breathable MTB shoes?

I have been using the Sidi Womens Dominator MTB shoes for several years. But it's time for a change. I want a more breathable, and comfortable shoe. I still want a stiff sole, but something breathable that won't stretch out (I spoke to a gal in a bike shop that had Specialized mtb shoes that stretched out on her, they are more of a mesh/leather combo).

My feet haven't been crunched in these, but I think a bit of a wider toe box would be nice. Money is not an issue as I ride a lot and want a good quality shoe!

Thanks for your help!