I know this is a perennial topic, but I'm looking at getting a new sleeping bag that is lighter and compresses smaller than my Marmot Helium, which I've used a long time and love. I've got some gift cards etc. so need to go the non-cottage direction. At any rate, here are the options I'm considering: Marmot Hydrogen or Plasma (30 degree); WM Summerlite; MH Mountain Speed; Sierra Designs Dridown Cal (30).
Anyone have any thoughts on any of these? How is their compressibility? I was nearly sold on the Mountain Speed for its weight and its size in the stuff sack, but after reading about it, think it's not the way to go.




