i was using a down bag on canoe trips for several years but i found that after a couple weeks on the trail they lost their loft...it was like sleeping between sheets of cardboard..the air is so humid around all those lake that even hanging the bag up to air out did not help much..now i just use a middle price poly fill bag and if it's cold..below 40's at nite..i just wear my poly fluff soxs..pants..shirt..
the Thermarest two inch pad is a life saver for older guys like me....i think where i was going with this is where do you plan to use the bag??..if i was out West i would go back to a down bag for the cold-dry climate..