Looking at possibly purchasing a new sleeping bag. I think I have narrowed it down to one of these three. They all look good but Iím not sure. The prices are similar for the FF and WM but the Marmot is a bit less. Weights are about 2lbs give or take an ounce or two. Any opinions would be appreciated.

Marmot Helium 15 deg
Feathered Friends Swift 20 deg
Western mountaineering Apache 15 deg Western mountaineering Alpinlite 20 deg