Officially a Boxing Day sale but you can buy a Montbell Plasma 1000 jacket for half price in-store (Kent St, Sydney) or over the phone (free shipping) starting tomorrow.
The jacket has the highest fill-to-weight ratio in the world at 1000 fill power (100% down)/135g.
For comparison, the UNIQLO UL Down Jacket is 640 fill power (90% down)/266g.
For people keen on this, just watch out that you don't/do want a hood. The picture doesn't have one but anytime I want an amazingly warm jacket, I've wanted an amazingly warm hood too.