dysons are medium weight, i can pick one up and hold it sideways with one hand, but there is alot of upper end weight due to the large cyclone and hose setup.
compaired to a kirby its like a feather, compaired to a oreck its a bag of sand (there is not much to oreck but it is impressive i can pick it up with one finger by the cord.
the weight is there but that is the least of its issues.
in my opinion, the newer dysons get, the worse they become, older 07 are so so, new ones to me are not worth the box it comes in.
the whole swivel system is just hype, it does not make it any easier to use, to me, its makes it more difficult.
there is not nearly enough suction or flow to deep clean carpet, it will just grind it into the backing, i have tested a kirby/dyson side by side and the difference is incredible, ive also tested a low end 5 amp eureka and a royal metal, again no compairison, even a scrawny oreck xl blow it out of the water, you can feel the other machines suck the carpet off the ground,and beat the heck out of them, the dyson can not suck up the carpet, and the brushes just make it to the carpet, dyson lives on because of it coolness and form, not function.