Recently got my MB XL down jkt - so small, so light, so cozy. At 160ish g, it weighs half as much as my shirt, and 1/5 of the weight of a similar warmth pile jkt. A "no brainer" for me. Chuck your raincoat over the top, and you'll be warm as toast in 3 seasons. I figure that putting my Bozeman MW Coccoon over the top of this, and that'd be perfect for ski touring in Australia.
Andrew A