In reply to TobyA:
Isn't January in Arctic Norway a bit early though ideally? Not much light. I have limited experience but was in Alta during mid-February last year. Ice was very brittle and looked as though it just needed a little freeze-thaw in order to fill everything better. Sensed we were still too early for optimal conditions.
Another suggestion would be Hemsedal and Valdres. They are close enough to combine. There's a lot of South facing classics that are best climbed in January before the sun begins to damage. Eg Grønndalen, Grøtenutbekken, Stavadalen, Skogshorn. I haven't visited Lærdal yet but that also looks to have some seriously impressive lines in the WI5 grade.
I haven't climbed in Romsdal in winter but it looks to have some monster ice lines if in condition. I've seen the lines during spring and summer and look an ice climbers wet dream potentially. If there were poor conditions in Romsdal then you could easily switch to Oppdal. Drivdalen is high altitude and a reliable plan B.
Isklatring.no is a really good website to look at. Quite a few free pdf guides.