I'll be upgrading my boots in the coming months and am wondering how much insulation I should get in them. 400? 800? 1200? I need these boots to be a 'do it all' boot here in PA. So from early October archery hunts, to rifle, to after Christmas flintlock, to late season archery in SRA. ALso the possibility of a hunting out west for elk is in the near future. In the past I've used primarily Rocky rubber boots and am looking to go back to a leather hunting boot. My initial thought is to go with 800 grams of thinsulate. Thoughts?