We've considered the Actifry and Airfrier machines, but in the end decided that they were too limited in what they'll cook, so we use a traditional fryer with a removable bowl that's easy to clean.
I've just looked on the Which? website. Their best buy is a DeLonghi PremiumFry F34412CZ, at around sixty quid. It sounds very good, and is easy to empty and clean. Which? like the Actifry as well.
The Delonghi F26237 doesn't come out of the tests so well. They say that it's inconsistent (some of the same batch will be undercooked, others overcooked), difficult to empty, and difficult to keep clean. But it's half the price of the PremiumFry model.