In reply to llanberis36:
As other posts have said it's a personal choice. I use a BD pole that is a fixed length and splits into 3 parts so it can live in my bag when I'm not using it. It goes without saying you'll have your axe and you know when to use. More useful is that my pole has a foam handle below the main handle. Great on un-even ground, and keeping your hand out of the leash.
Poles are great at taking the pressure of your knees, making things more stable and keeping you balanced. My advice is to take them on your acclimatisation climbs and see if you get on with them. Simple.
And don't forget snow baskets!