Thanks again for the informative replys.
My OEM tires (Bridgestone EL400) are down to 4/32" after 56,000 kms. I don't trust them anymore for winter operation.
I only drive about 8,000 kms per year. If I can get 6 years from the Nokian WR G2, then that would be great. I was quoted $1080 (total out the door price) for the Nokian WR G2, so that would only be $180 per year, which seems reasonable.