We only ever use Dyson, we havent found anything better.
the only difference with the Dyson Animal compared to other Dyson's is a filter that prevents fine dusts and pathogens being released from it. it doesn't claim to be any more suitable than any other Dyson apart from that, we just went for the ordinary one, works great on dog hair.
Another good thing about Dyson, if it breaks, they will come to your home to fix it and will charge £60 with no extras. (I think that is still the case anyway)