personally, i've been using scarpa omegas for ice and snow hikes. why, you may ask. well, when i go on trips, my boots will get wet, no matter what. whether from sweat or snow, they'll some how get damp, and anything but plastic will freeze at night unless you sleep with them in your bag. with plastic boots, theres nothing to freeze on the outer shell, and the intuition inner bootie doesn't absorb water and can be worn without the outer shell around camp and in your sleeping bag (which is very useful when you have to go pee in the middle of the night). I find that my omegas climb vertical ice and rock pretty well with crampons (not as well as fruit boots, but thats a different class of boot), they are very light for a full plastic boot, and they have enough ankle flex and the foam will give enough to make them okay to use on approaches, even flat ones.
I find my omegas work best when using a thin, knee high wool ski sock, a integral designs vapor barrier sock, and then an outer mid weight wool sock. this make it so the main insulation properties of the outer sock are not compromised by sweat, eliminates any vapor heat loss, and with three layers i don't get blisters if the laced correctly.
the only other boot that i've been very interested in trying are the new Salewa Pro boots, however they are not double boots. the switchable sole is interesting still.