VMan showed me his Spark boots he just picked up. They are pretty damn nice. The Vibram sole is the big sell on them. I'd like to see them all Boa'd out, but that's a personal choice. Overall, they seem to be burly but not over built or over weight. Kicking steps in snow and grip on icy rocks is going to be much better with these.
Is it a plastic like sole beneath the vibram sole like a ski boot?