I have had good luck with Irish Setter Big Game GTX w 800 gr thinsulate. Unfortunately, they don't make them anymore, but I'm sure they have something equivalent. The Shadow Trek may be similiar.

I bought some Danner Pronghorns (400 gr thinsulate) last year for a bridge between the Irish setters and snake boots, and they are very comfortable, but they leaked right out of the box. Several applications of waterproofing seem to have stopped that, but we will see this next season.