I'm very tempted by a Dyson cordless for our new house which is a townhouse with no less than 5 small staircases 
Given that we are shelling out for a lovely new carpet, I would like to keep it clean, and the thought of lugging my Henry up and down the stairs is filling me with dread.
Any thoughts on cordless vacs, Dyson in particular? I don't want to spend a fortune and amazon have the V7 on offer.....