I would have to concur with ChrisFol about the SD bag. Go with a 800+ fill down bag and spend the money! It will compress smaller, retain its loft longer, and reduce your pack weight by another pound or so. I tell parents who's kids recently joined the BSA troop I am SM for to by the lightest, 20 degree bag you can afford. In the past it's been the Cats Meow or the REI Sub Kilo, now it is usually the Cats Meow.