What's the best upright pet vacuum for deep-cleaning carpet?

Across high-trust testing sources, the Shark Vertex (AZ2002) and Shark POWERDETECT score highest on carpet pickup, with Vacuum Wars calling the Vertex one of the best vacuums for surface debris and giving the POWERDETECT a near-perfect pickup score. Both are pricier than entry models, so shoppers who mainly clean low-pile carpet can also look at the cheaper Navigator and CleanView models.