If I were forced to only have one, I would go with my Dual 80! But, I grew up with Grandma's Sanitronic 7, when I was really small (no older than 5) she would ask me to sit on the hood and hold my feet on the nozzle to weigh down the front of the vacuum so it would work better. I always got a kick out of that! I still use the 7 to this day, Gran passed away in 2002 and I made sure that it was saved!