Jury is out whether the Salomon or the K2 have won this catagory, and whilst every well know brand on the market are make a "split" boot, these are the only two that we can cover with out lifetime Fit Guarentee. They are built beefy as a traditional Mountaineering boot, have ridgid crampon compatability, both traditionally laced and Boa Conda for the heel retention. This is the more adventerous of the two boots, so maybe go for the Salomon if you're hiking to ride, and the K2 if summits and steep lines are the order of the day.
K2 Aspect Snowboard Boots
Traditional Lace and Boa Conda.