In reply to The Lemming:
In my profile photo, I'm wearing a TNF Himalayan Parka (photo was not taken when I lived there but when I visited), only reason I'm wearing it is that my luggage was lost on the way there and borrowed my mates. Complete overkill although I wasn't cold!
In the other photo, it was minus 20 and all I'm wearing is a baselayer, fleece and an Arcteryx Gamma MX hoody albeit because I was dog sledding but that was fine. Any down jacket would be ok, at the time I had an ME Vega and again, probably just a bit too hot for me. It was at least minus 20 for 2 weeks and I managed no probs with an extra layer and the MX hoody, only parts that were really cold were my hands and head so good gloves and hat.
Even wore the MX for skiing at Sunshine village where the lifts can be 20 minutes and admittedly I got a bit cold on the lifts so threw a primaloft jacket over the top and was fine.
Are you going anywhere exciting!