I would like to see something from the Arcteryx Atom line, my favourite gear maker.
A few initial thoughts on the Sitka:
This is a very warm jacket that would be hard to get cold in. Some testing will be done in extreme winter conditions, specifically high winds on the hard water. This jacket should do well in those conditions. This environment is similar to the late season hunts that produce winds all day long with temps into the teens and 20s.
I ran the stuff sack under water and it didn't get wet at all. Very well thought out and protects the jacket well.
The down fill in the arms is very heavy, and the extremities should retain heat very easily. Mobility is the cost of the heavy insulation though. There is plenty for a cold morning glassing, but for lots of movement it could be cumbersome.
Field photos should come after this weekend.