[QUOTE=ralfp;9019325]My bags usually include
a non-insulating shell like this, and a fleece.
I agree. Coming from Madrid and heading to the Northeastern US in January or February, I usually don't need more than a shell like this (and Decathlon has them for a lot less than $299) plus a wool scarf, good gloves, and a wool sweater under my blazer.
Its got to get down to about 15º F with some wind for me to need more than that.
That said, when I did East Lansing in February I had to dig around in the back of my closet to find a really thick winter coat and some good boots, and lug them through the Madrid sunshine to the airport. I was happy to have them in Michigan, however.