lori-ann...
I agree with Stan (sptyks). A nice, high-quality metal vacuum will last and last and last. Some of Kirby's earlier models are notably long-lived. For example, I have a 1954 Kirby model 514. Despite being 60 years old, it's still an absolutely incredible machine. It's lightweight, powerful, and not too terribly loud. Sure, it leaks a little dust, most older cleaners do, but if allergies aren't a concern, it's not a big deal. The best thing, however, is just how well it deep-cleans carpets. You will never, and I mean never, see a new, plastic, Wal-Mart vacuum lift the carpet off of the floor. That's just how much airflow the 514 has. As it lifts the carpet into the nozzle, it gently agitates the fibers and the HUGE fan whisks the deep-down grit away. This process is what Kirby called "Triple-Cushion Vibration". (see picture) Oh, and emptying the bag can be a bit of a chore if you dislike having some dust billow out of the emptor when you open it. LOL
Another great machine, if you have a lot of carpeting, is any canister that has a lot of airflow and a good power nozzle. One of the best canisters I've used is a Compact model C-4 that belongs to my grandma. Now, keep in mind that this machine does NOT have a power nozzle. The later Compacts, as well as my grandma's C-4, did have the option of using one, but hers didn't have the correct hose to accept a PN. What I used instead was a Vacu-Flo T-21 turbo nozzle that used the vacuum's suction power to spin a beater bar. Despite what some may say about turbine nozzles, this particular power head cleaned incredibly well. It was quieter than most electric power nozzles, and the Compact's suction was more than enough to spin it quick enough for deep-cleaning. The combination of the T-21's beater bar/bristle setup and the Compact's awesome airflow made it a very formidable carpet-cleaning machine.
Here is a picture describing how Kirby's Triple-Cushion Vibration works. They were very ahead of their time.
