Can you recommend a water repellant down sweater…

Sierra designs gnar light has 3 oz dridown. Mountain hard wear ghost whisperer has about 2.78. I have no personal experience with either though

Just came across this video:

http://www.youtube.com/watch?v=pIaWk0b8Jro

I'm surprised there are not more reviews/tests of the various "Dry Downs" on the market. If Patagonia's Encapsil performs this poorly I would conclude the technology is not there yet.

The jury is still out for me on the value of water repellant down. I prefer to go the route of having my down pieces made with good performance shell materials. Feathered Friends makes great down pieces with performance light weight shell materials. I have found Pertex Quantum Endurance UL to be good and older FF down pieces can be had on Ebay or on sale at FF made with Epic. The FF Daybreak is a popular UL choice but I prefer the Hyperion, which weighs about 2oz more, but has about 2oz more fill. I have the Hyperion vest made with Epic fabric that is about 8oz in men's XL with about 4oz of fill. Nunatak also still makes down pieces with Epic. FF and Nunatak are very spendy, but can be had on sale, on the Gear Swap Forum, or on Ebay for good prices and their quality is great.

I bought one of these last week and like the fit. They are not using Dri Down, but the shell contains a WP/B membrane for water resistance.

Down fill is 3.5 oz., jacket averages 11 oz.

I have also been using the WM Flash with a merino wool base layer in 20 deg F weather here in Utah and have been comfortable with it.

The marmot Hangtime and Guides Down are both pretty substantial hooded winter down jackets. Not expedition weight (they are sewn-thru quilted), but definitely in the category of heavier winter jackets. Marmot's two down "sweaters" would be the Zeus (800 fill with polyester ripstop) which weighs about 15 ounces and the non-hoody version of the Quasar (900 fill with Pertex GL and weighs something under 9 ounces. Neither is "water resistant down".