This year, I have changed over to a layering system from the big jacket system, god I love it.

I wear the following in these 30 degree mornings, and so long as there arent 20 mph winds, I am toasty all day.

UA Short Sleeve Compression Heat Gear (Cold Gear feels itchy to skin, only for comfort not warmth)
UA Long Sleeve Compression Cold Gear
Gander Mtn Polar weight Fleece 1/4 zip base layer pullover (extremely lightweight yet verywarm)
and lastly a regular button up cotton camp shirt (UC or Predator)

My bulkiest layer is a button up camp shirt, the same one I wear in September by itself. When the temps drop some more, I will add the new UA fleece vest underneath that I just picked up....Jacket stays in the pack, only for windy or possible rainy days.

The best part of this, is how easy it is to dress on stand. I usually wear all layers into stand, depending on how far I walk...UA is great at wicking sweat, so your clothes dont get wet and then cold...but if I know Ill sweat on the way in, I only wear the two UA layers, then pull on the fleece and button up shirt once at the base of the tree.