Nokian is a high quality European tire maker. Their winter tires are highly regarded in Northern Europe. I've had a set of Nokian winter tires when I lived in Germany. They were very good. However, like switz mentioned, they could be difficult to obtain on the road. That is where having a spare that matches the others on the ground comes in handy.
I've had the Michelin LTX M/S2 P235/75/15 108TXL tires on my Ambassador for nearly five years now and I've not had any issues with them. They have about 25,000 miles on them. They will get replaced before the next long trip this summer.
Work is never done, so take time to play!