I'm in the market for a new jacket. Currently favoring the FirstGear Kilimanjaro (in hi vis yellow). Like the idea of providing your own mid layer and a breathable/waterproof/windproof all purpose shell like Gore Tex. Seems like an affordable version of the Klim Latitude. Concern is the hot weather venting is limited although I have a mesh jacket for summer. My primary use will be just above freezing (with heated liner) to 25C. How is D3O armor in cold weather? Does it stiffen up or stop working? How breathable is the "37.5" membrane compared to the Gore Tex? Other jackets I should look at?