I have a pair of b dogs and a pair of volkl walls. When I want to fucking bomb all mountain, I use my walls. When its slushy or there's powder (east coast), I use the B dogs, which are similar to Alpha X's, but are more like the Halo's. I have ridden the Alpha X's before and they're amazing for all mountain because the stiffness, especially compared to the edollo's really help at high speeds.
tl;dr Alpha X