Dyson DC50 Compact Animal Upright Vacuum (Certified Refurbished) - $199.99
If you don't mind buying refurbished (and you shouldn't when it's through Amazon; they're great about returns), this deal is for you! This light-weight 11.6 pound vacuum is a Dyson, which is a brand renowned for its innovation in the vacuum industry. The ball style let you maneuver the vacuum easily.
One of the lesser-known features of the Dyson brand upright vacuums is the hand tool that detaches and stretches significantly. I use mine to easily clean my stairs and dust my ceilings. I'm really short, so the fact that I can reach my ceilings with my Dyson hand tool and no chair is amazing.