I've been looking at getting the Big Agnes Storm King bag. I'll be using it for 3-season backpacking in MT and CO (high altitude with potentially cold nights). I already have an insulated air core pad which I like better than a regular thermarest. The reason I'm looking at the BA bags is because I ALWAYS slide of my sleeping pad and loose whatever pillow I have in the process. I haven't found a lot of substantial reviews on BA bags, especially ones that comment on how they perform in cold weather and I was hoping some people here would have some good input for me. About the only I have read on the BA bags is that they're about 15 degrees off on their ratings, which is I why I was going for the 0 degree bag and planning on only getting 15 out of it.
Thanks in advance!