Ive got a Marmot Pinnacle 15Deg bag I use for backpacking and non-winter mountaineering, but I'm planning on doing a few 14ers this winter and I think a warmer bag would be needed and I'm looking for advice.
I'm considering getting a below zero rated bag like the Western Mountaineering Puma -25 or the Feathered Friends equivalent, but I'm wondering also if a 0 Degree bag like the Western Mountaineering Kodiak might be sufficient. I don't want to have to buy another bag if I decide to do a bigger mountain some day.
Advice?