Another thing to consider is where the vacuum cleaner was made. Today, most of them are made in China. I use one that was made in the good old USA, but when I was in the market for a vacuum cleaner, I considered getting one that was made in Germany.
Yep, we have two Oreck uprights - made in the USA. Sadly, the company was recently bought out of bankruptcy by Hoover's parent corporation (which I believe is part of a Chinese conglomerate). So for a while, Hoover will continue to make use of Oreck's assembly line in Tennessee. After that, I'm sure the brand will have a lot in common with the stuff at the Harbor Freight store.
A great vacuum made 100 percent in the USA is made by Riccar. They have a canister and an upright. I bought the upright because the vacuum store owner raved about their customer service, and I got tired of buying Chinese made vacuums that lasted 6 months and died. It’s been great so far.