We have quite a collection, a large heavy Dyson for upstairs, a cylinder Dyson for downstairs (could not carry the heavy one up and down stairs) and DD1 bought us a robotic cleaner as we have some hard floors downstairs. We call him 'Bob', but he does get stuck under the conservatory furniture. ( All collected over many years.)
However, I would love a cordless handheld vacuum cleaner for quick jobs, such as the stairs and conservatory. They Dysons are quite expensive, but seem to be the best from reviews.