Looking to upgrade my bag. I'm a horrible backcountry sleeper and currently am back to my Marmot down mummy bag. I tried an EE quilt last year and hiked it back to the rig after one night. I'm looking for opinions on the best bags that are ultralight and rated at around 20*. I'm a side/belly sleeper with a leg jack knifed and at least one arm under my head. Ideas?