Nokians are great tires. We have their Hakka SUV's on our Q5. The WRG2 is Nokian's highly regarded all-season tire that's snow and ice rated. There is now a WRG3 which I have yet to hear anything about. I can only get Nokians in my area on special order, and the closest dealer is an hour away. The DWS is close in concept, though I doubt it's as competent in the snow. The DWS should wear better though.
http://www.nokiantires.com/tyre?id=1...me=Nokian+WRG2
http://www.nokiantires.com/tyre?id=1...me=Nokian+WRG3