In reply to petre:
Head for mid(south) Norway, base yourself in the vicinity of Hemsedal. Little bit north you've got Laerdal, to the west Aurland and Gudvangen, to the east Vang/Valdres. All areas more or less in 1-3h driving time from Hemsedal. All aspects,grades, length you can think of. World class.
You don't want the real north in January, almost no light and an extra 3000+ km of driving.