I bought some Rocky mountains this year that were on sale for @$50! I was a little skepticle, but I walked through swamp water that was several inches deep and was in my stand in 18 degree weather. My feet were absolutely dry through the swamps and warm the entire time. I believe they had 600 gr thinsulate. I'll have to see if I can find the model on them, I left them up at my dads house in PA, bc thats where I hunt and I don't need a warm boot down here in FL, but for a low priced boot they were absolutely perfect. I did lots of hiking in them up steep hills and all over the woods to get to my stands and they were very confortable.
PS....just noticed your Sig, I just printed out the charity shoot in Jan, you going? I'm 95% certain I will, this would be my first TBOF event.