That sounds like quite the trip in theese beautiful times of snow AND sunlight! :D
Im from Tromsø myself. I have driven on those roads a few times. Through Abisko, Kiruna and Luleå to go to the south.
Also visited Pajala once. We then drove through Kilpisjarvi and Kaaresuvanto, witch is a town that is part in Finland and part in Sweden. I must admit though that, in my experience, the roads in northern Finland is far better than both in Norway and Sweden. Have you ever been to Norway?