the higher end Sharks like that have three filters, all washable. You can also get (generic) extras cheap.
I'm completely sold on those Sharks. There will be many variations of the same model, having different accessories. I have also added separate accessories for various purposes.
The Sharks in the $300-350 range are awesome. I do recommend getting a couple extra sets of filters. The non-Shark ones I've gotten on The Evil A have always been excellent. I wash them a LOT more frequently than suggested, which makes having extras a nice thing.