In reply to Babika:
Difficult to comment without knowing your skiing ability/wt/ length of ski. These are a good piste ski for an average skier, but won't be good in deep powder, shallow powder will be fine.
I've come to the conclusion that if you can afford it you need 2 pairs , one for the piste and one fat pair for powder days, off piste, but I don't work in winter just ski so I suppose I can justify the expense.
If you get loads of powder when your away I think I would hire some fat skis, it's just so much better fun!
The only thing I would say about shops is to remember they'll only want to sell you what they stock.
Post edited at 15:35