Im looking at a few different boots from 1000,1600,2000 grams of thinsilate. My feet do get cold when im sitting so I want something that will keep them nice and warm, on the other hand I dont want to go to was and have my feet soaked in sweat. Ill be useing them in some pretty cool weather maybe 20 degrees inthe morning and walking in snow... what do you all use in that kind of weather. Im leaning toward the 1600's cause its right in the middle but the 2000's really wont cost much more and dont want to regret it later.