Thanks. For the cheap down route, I might look at Uniqlo since I like their stuff and it's very affordable.

I should say that if I went on a trip today, the coat that I would take would be a Marmot Novus Hoody, which is a 40g/m2 synthetic fill jacket. It's pretty warm; I just wonder if it would be safer to have something warmer. But I would obviously want something warmer than that in order to buy something new.