Bill-You said, "The Ion seemed to be better and after a couple of miles I would have to un-zip the Ion but my body never really moved much heat to my arms."
The above leads me suspect that the arm cuffs and neck opening on your Ion are not forming an air seal. Many of my wind shirts would chimney effect draft (natural convection heat loss) from the wrist opening, up the arm and out the neck before modification. I darted the wrist elastic and neck material, as was necessary, to create close seals. For less than a gram in thread, it made a dramatic difference in warmth.