is the dc27 the same size (can't find any on display in shops)
The DC27 seemed to be a bit of a non-starter.
We have had a few in for simple repairs, replaced motors on a few, but we have had difficulty sourcing some parts for them - even from Dyson.
True, I also seldom (if ever) see them on display anywhere. The DC33 seems to have leapfrogged it.