I just received a zpacks sleeping bag.
You can have the best of both a quilt and a sleeping bag. It lofts, balloons up nicely.
Description: 20 Degree Regular Width Sleeping Bag, Item#: ,
Length: Medium - 5 feet 10 inches (16.8 oz) with 3 ounces of overfill
(19.4 oz on my scale) Black 7D inner and outer.