I can't speak to whether on not the Dysons last...but they do suck!!!
I was in your same situation back in May. My plan was to go to Sears and get one of their Kenmores that was a best buy in Consumer Reports. While I was there, so was another couple who had animals. The one saleslady who claimed to be a Dyson owner herself gave a demo. It was on sale...but still a lot...for a vacuum?!?!
She allowed me to handle it. I was amazed at how easily it handled. So...I spent the $500. Couldn't believe I did it...but I DO NOT regret it. I have the Ultimate Animal (purple). It has handled the hair of 10 cats & 4 buns quite well.
The version I got came with a bunch of attachments. I have found them invaluable. And I think it is more economical to get it with the attachments right away as they are a bit pricey individually.
It has clogged on me 2x due to hay. But the clogs have been amazingly easy to clean. I've also taken it apart to clear some gunk that got on the rollers. Again, very easy to do. I would highly recommend spending the money.
To clean up bunny hay, I use a dustpan & brush followed by a sweep with an "All Around". It is the tiniest shop vac they make, but a powerful 7.0 amps. If I had to do that again, I'd probably buy a bit bigger Shop Vac because this one's hose clogs easily due to the little lip at the insert. But it is very heavy duty, small, and light. And when not clogged, it sucks like crazy. Pipkin likes to stand on his hind legs and help push it around the room
Sorry my post is so long... Hope the info is helpful.
~Mary Ellen