Under Armor Brow Tines. $180 at cabelas. 400 gram thinsulate (my feet don't really get cold). First day I wore them I hiked 12 miles (at least 2 or 3 in 4" of water) at 10,000' scouting for elk. No break in period necessary, still look brand new. They're fairly light as well... feel more like a gym shoe with good ankle support than a classic boot.

The tighter you wear your boots the less circulation you have the colder your feet will be. Next time you're in your stand try loosening your boots and I bet your feet will stay warmer. If you're going to wear heavy socks or do a lot of hiking size up at least a half a size (your feet will swell from lots of hiking). I've found wearing gaiters traps a lot of heat and my feet stay warmer as well.

Another good trick if your hands get cold is to put hot packs on the inside of your wrists.