I have tried the three machines in question-at present I have the Meile Red Velvet.Its a nice unit-the power nozzle is very good-and adjustable.I rule out any powernozzle that can't be adjusted.I feel the Riccar 1800 powernozzle is the best out there.That one almost has the vibrating-beating ability of an upright.and the brushes on the metal roll can be changed to suit your carpet.And of course they can be replaced when worn.The Riccar 1800 uses a Filtrete bag like the meile.In fact Meile is said to be Riccar's closest competitor.The Meile Red Velvet hose handle is AWKWARD to use with the hand tools.the Riccars is easier.Same with the Sebo C-3.All three machines have adjustable speeds.