T.F.
I used a $250 Hoover for years. I have one for upstairs and one for down stairs. They were great.
About 2 yrs ago, I got an Oreck that I LOVE. It is so lightweight, I don't need to have the extra upstairs. It has a HEPA bag, (I'm not into the bagless), 10 yr warranty, go in once a year for service for free. I love this vac. I do have 3 dogs, carpet, tile and hardwoods. I paid around $800 for this vac and it is worth it.
A LOT of people talk about Dyson and how great they are. My mom has a Dyson and hates it. She says it works well, it is just heavy and hard to get around.
Good luck.