Zamberlan Mount Trek GTX RR -- I've used them for goat/sheep/mt climbing. They take crampons which I've used. They are stiff in the right places to me but also have some flex. Worth a look.
From the site and if you believe marketing: Made for increased "hikability" the Mountain Trek was made to more easily transition from climbing to hiking with a hike-friendly midsole. Technical DNA endures allowing for climbing technical routes with or without gear. Designed for high-level mountaineering and glacial routes as well as high-altitude big game hunting.