Pharmer, my sons and I use a 600/800 gram thinsulate boot and the Artic Shield boot warmers. You then have the flexibility to take them off and cover some serious ground without getting tired from heavier boots. I use a 40 gram thinsulate wool gomits and hand warmers when need. I also carry, and encourage my sons to carry, a second pair of lighter leather gloves for when we are on the move. We layer for warmth but my outer layer is the same as Rutnstrutts, Gamehide hollowfill. Way to warm for any kind of moving around, I will often leave these at my treestand and still hunt with several very light layers. Something I've only just begun wearing are turtle necks as mentioned above and they add a great deal of comfort. Think about how you intend to hunt and decide if you need to be flexible or if you pretty much intend to stay put during your cold weather hunts. Everybody decides for different reason what they like best and I keep change my mind about thing.
Good shopping and Better hunting.