I have the same pullover as TJB and Lukem, too.
60gr of Primaloft One, packs down small, kangaroo pockets, and IIRC it only weighs 14oz. Worked great for me last year, and through this winter as well. Got it in green and under $60 last year, a real bargain at that price!
Got a new hooded down puffy from Backcountry to grab for this coming season, but that Cabelas Switzer will still see plenty of use...