In reply to Davelim8850:
I'm just back from my first weekend touring with my new light, skinny (for me) setup of Blizzard zero g 85s with Kruezspitze GT bindings and brakes. They weigh 1.5kg per ski and binding/brake, so pretty light.
The conditions were quite deep powder for NZ, at least a foot of fresh wind blown powder, some breakable crust, quite a few buried rocks.
They skied surprisingly good, but I think I've finally started get reasonable skiing in powder: I wouldn't have been so happy skiing so narrow in the past.
However, they look pretty trashed on the edges and base for 3 days use: durable they are not!
My conclusion is that for NZ, and other places with variable snow and not much powder, I would use a ski 80-95 underfoot most of the time, not too heavy, but not too light either, and predominantly cheap, so I'm happy skiing them hard without worrying about every possible buried rock.