Didn't see a post saying you had made a purchase yet, so I figured I'd chime in. I'm a big fan of Sitka for the layering aspect. Best example I can provide is a day when I was up north for the January archery hunt. In the morning sitting on the ridge it was extremely windy and in the low single digits. I was wearing: Traverse Hoodie, Kelvin Vest, Jetstream Jacket, Traverse Pant, Kelvin Pant, 90% Pant, Blizzard Beanie, Neck Gaiter, Jetstream Gloves, Smartwool Socks and Schnee's Beartooth Uninsulated boots. I was extremely comfortable. The only part of me that got cold were my feet and hands, which I chalk up to the heavy winds. I plan to get some Schnee's pack boots that are insulated to fix the cold feet issue. As the sun popped up and the wind stopped, I very quickly and easily stripped off some of the layers (temp hit mid 50's) and remaimed comfortable. I hear great things about Kuiu but have no personal experience. Given that it was founded by the same guys as Sitka I can imagine they are very similar. I wouldn't rule out Under Armor gear also. I know a buddy of mine in Wyoming who guides loves their gear too. Haven't tried the new First Lite stuff, but a few years ago that stuff drove me crazy as it was very itchy. I chalked it up to sensitive skin, but my wife felt the same and she never complains about material. Hope that helps somewhat.