I have awesome results with my pro flite - super quiet backpack vac with wand. its light and it never clogs from hair! very fast and convenient specially for all the comercialwork I do, chairs desks ect I like having a vac with brush however oping brings so much hair and debris to the surface that normal vacuuming couldn't.
I just bought a Kirby G7 This machine really is the best I have ever used. I have owned and sold alot of Kirby machines I never appreciated them as much as I do now. The self propelled models are far superior to any other type of machine out there. People say oh but they weigh so much The direct drive tranny makes this machine push and pull with about 2 lbs of pressure. Ovr a period of a day your shoulder and elbow will thank you for it. As far as suction goes how many machines that you know of actually try to pull the carpet into the roller