I would get a pet blanket and give it to the breeder a few days before collecting the kitten, so that its' mum and litter mates can lie on it, the kitten can then come home with the blanket full of familiar scents which are very comforting. You can put this in any cat bed you choose. Beds are very much what you fancy, but the kitten will have a mind of its' own and may reject your choice in favour of a comfy human chair or bed, so don't spend a lot. I would get something that is fully washable.
I have no experience of the snugglesafe, but depending on where the kitten will sleep, may be useful (if your house is on the cool side!)
You will need food bowls and a water bowl, litter tray and litter (start with what the breeder uses and the kitten is used to) kitten food (as advised) and some toys. Recommended are toy mice and fishing rod toys. A scratching post is a good idea too, some have toys attached. Look in Pets at Home for ideas, they do a leaflet advising what to buy for kittens. Remember you will need a carrier to collect the kitten in.
The kitten may be fully vaccinated, but check whether it has also been wormed and treated for fleas. Check what has been given and when the last dose was, and book yourself a vet check up appointment so that they can check over the kitten and provide further treatments. I think my vet did a check up every 3 months for my kitten until she was 1, basically development as well as health. Some vets offer loyalty schemes where you can pay monthly for your pets annual vaccinations, worm/flea treatments, and 6 monthly health checks, also discounts on diets and other treatments and spaying/neutering. Sort out pet insurance as well.
Finally, if you have never had a kitten before, I suggest buying cat owners magazines available, they have useful articles on behaviour and best buys for cats. The vet will also have leaflets on health.
Don't let the kitten out until it has been neutered/spayed, and be aware of the foxes and badgers likely interaction with it, the vet will advise of any health risks.