A logical place to start is the V8 vacuum, which offers some key improvements over the older model. The latest version of the V8 vacuum is the V8 Cyclone, which normally retails at Best Buy for $399.99. Dyson says the V8 Cyclone offers 150 air watts (AW) of suction power, which is a significant improvement over the 100 AW of power on the V6. The V8 Cyclone will also run for far longer, with a maximum of 60 minutes runtime, compared to a 20 minute maximum for the V6. It is a bit heavier though, weighing 5.74 lb, while the older model weighs 4.5 lb.