Zip duvet cover recommendations?

[RubaiyatOfAnyone]

I’d like to slowly start replacing all our duvet covers with zip covers for convenience.

Has anyone bought any they would recommend?

(Bonus points if not too spendy)
(Bonus bonus points if anyone can recommend anything in plum colour)
thanks!

I have a zip cover from ikea, didn't realise it was zip when I purchased it and don't know if it's standard on their bedding. It's good quality and washes well (although sadly requires ironing really)