You might want to take a look at these Irish Setter VaprTrek boots that the sell at Bass Pro. Waterproof, lightweight, some insulation. Sounds like they are in the class you are looking for. I went to these when my Danner Pronghorns proved to be too much boot for some of my outings.
http://www.basspro.com/Irish-Setter-...4011108514614/