I am shopping for a new pair of boots for ice climbing and mountaineering. Looking at various Sportiva models, and there are just enough choices to be confusing. Nepal Cube, Trango Ice Cube, Batura... If you have climbed in any of these please let me know what you think. My feet are relatively narrow, and run a bit warm. I dont need a lot of insulation, but I like a boot I can use for long approaches.