I would like to invest in a good insulating jacket. I have looked at both the Kuiu SD and the First Lite Puffy. I wear both brands during my Early Elk hunts in Eastern WA. Mid to low 40's during morning hours and mid 80's later. I plan on using it mostly glassing during the cold mornings and when the sun starts going down. How do they compare when it comes to blocking wind and keeping you warm? How well do they pack down and how durable are they? I don't plan on bushwacking while wearing them but I don't want a snag to ruin my jacket either. It would probably spend half or more of it's time in my pack if that makes any difference. Thoughts?