Sorry you've had such trouble with the Hoovers! We've had a Hoover Wind Tunnel Ultra for about 10 years and have had absolutely no trouble with it. It's great with cat hair and the filtration system seems to work well. Consumer Reports consistently rates it (from back as far as when we bought ours) one of the best.
When I'm looking to buy something I usually obsessively research it and find that among other sources, the reviews on Amazon offer a pretty good overall impression of people's experiences with stuff. But you probably already did that!
Still, the Dysons are popular and supposed to be good, although reviews of different models can vary greatly. I haven't owned one but have heard good things about them. One thing you might try is calling a couple local vacuum repair places and asking the people there what they recommend and see the fewest repairs for.
If you have access to Consumer Reports online,
here is a link to the vacuum reviews. Dysons don't rank extremely well, which is surprising considering how many people say they're great. On the other hand, the repairs are ranked as being half as many as for Hoovers.