Eureka Blaze 3 in 1, it's really light and comes apart easily. It can also be handheld and does furniture nicely. The suction isn't the best but it does a good job,
Amazon.com - Eureka Home Lightweight Stick Vacuum Cleaner, Powerful Suction Corded Multi-Surfaces, 3-in-1 Handheld Vac, Blaze Black -