My wife bought me a golf pull over jacket, It's wind and rain proof. I slip that under my camo sometimes, seems to work good at nocking down that windchill.
Also I were a pair of those slick sweat pants with a liner in them, over my thermals. sweats arekind of made of the same material as a windbreaker. Depends on how windy it is, I also add other layers. I only have the one piece insulated coveralls, and prefer to wear mythinner two piece camos, so Iadd layers under it...seems to work pretty good!

crutch