Tartufo

I'm not exactly sure about what vacuum to recommend, as mine is rather old but still working, however I read your

It must be able to deal with a lot of cat hair and litter

as you using your vacuum to clean up cat litter boxes?

If yes, I'd recommend looking into "Litter Locker". The company behind it is Canadian afaik (took me a good while to find that info when I looked it up though... the website is absolutely not ideal there). It's a smell-proof box where you can dump the dirty litter into, freeing up space in your vacuum amd allowing you to keep going for a while before having to throw it out. Should this be something for you, the requirements a vacuum has to meet definitely should go down or maybe your current one will still be fine then as you only mentioned suction power being too low for cat litter.

Tintin is listed under France for some reason. Definitely should be swapped imo because the author was Belgian.