Dan
the sebo dart is a vac, sebo duo is used for agitating dry cleaning granuals into carpets and agitating pre sprays
i have the sebo bs 36 vac, wich i find superb at exstracting dry soil from traffic lanes ect
if i was ready for an upgrade i would consider the dart, some of the lads have give it a good review ( only time will tell )
the sebo bs 36 is solid, takes everything you throw at it and does"nt mind travelling in back of van
Conrad