I have searched for information about the relative durability of different kinds of canyoneering ropes, but came up empty. I'm wondering if someone can comment on how the durability of these ropes compare? Imlay Fire 8.3mm Imlay Canyonero 9.2mm Sterling C-IV 9mm I already have a Canyonero, but thinking of getting a Sterling or Fire. So, in particular, is the Sterling worth the extra $$ if you were chosing between those two? Any other pros/cons besides durability and cost?