Nar, dyson up to dc33 are still the best, and much easier to empty than any bagged cleaner. Try carrying a kirby and its tools up the stairs compared to any dyson!
I took my Legend II to my mother-in-law's house last week, I was supposed to be washing their carpet but since they have a Henry I took a Vacuum to make sure I got as much dirt up as possible... Anyway my point was, I carried the Legend up both flights of stairs with no problem, and then Vacuumed the stairs on the way back down again, with no issues. Kirby's aren't as heavy as many make them out to be.
I also carry them up and down my loft ladder fairly often because I like to switch between them and I have to store them in the loft...
I'm sorry Mr Madrat, Dude, but I wouldn't have started this debate if I didn't believe I have hard ground to stand on... :)
I agree Dysons are lighter, but that is because they're made from weaker plastic.
While I'm here and on the Topic, I'd like to clear up that I hate Dyson because of their stupid prices, if their prices matched their products I'd have no issues with them.
It's not our fault they spend far too much on development and other crap.