wowza, thanks so much for all these tips. i am a little overwhelmed, and extremely grateful! i like the gloves tip btw, thanks for that. i always lose gloves anyway.
i might have to bite the bullet and buy while still in the UK, esp if i'm landing in chicago on dec 30 (distinctly possible) with no idea where to go shopping when i arrive, only to freeze to death that first day. also it'll get vaguely, minorly cold (though i appreciate it's like the bahamas, by comparison) in london over xmas and i don't have a decent coat right now, so the sooner the better really.
my mother, bless her, is trying to get me to buy this jacket from
the land's end catalogue. i really don't give a shit about style over comfort in this scenario though, so i might go for it.. goose down, layered, water repellant, 'TEMPERATURE RATING: -32°/-37° Centigrade'. the hood won't be fur though.. maybe i could get a fur hat to go with it... is there such a thing as a fur-lined new era i wonder..?
the norwegian jackets look amazingly hardcore.. i would definitely go for one of them, but if i can get a good enough down-filled jacket for £150/£200 rather than £300 then i will do.