Reply #24: I recently picked up a Shark Navigator.

[EOTE]

I haven't used a Dyson, so I can't really compare the performance of the two, but I can tell you I picked up my Navigator for under $100 shipped from Woot.com a few months back. It's a bagless cyclonic just like the Dyson and the performance is far superior to any vacuum I've used in the past. The first time I vacuumed my tiny condo with it, it picked up so much dirt and debris I had to empty it out twice. The thing is very powerful. Also, it's the lightest and quietest vacuum I've ever used as well. It doesn't look to be quite as solidly constructed as the Dyson, but it's less than 1/3rd the price. It's a purchase I'm extremely happy with.

http://www.youtube.com/watch?v=4yu-siq-p54