This is the chair I bought myself for my birthday.
https://www.officefurniturecenter.com/steelcase-leap-v2-task-black.html
At first it seems a bit crazy to me to spend $374 on a chair. But I spend a lot of time sitting at my desk, and expect to spend even more before this pandemic is over, while so many of us are working from home. It really is an investment.
Oh, and this video has very useful information if you assembled a used office chair you got for your birthday, and you wonder, “Should the seat on a top-rated office chair rattle around like this?” And then you found two extra parts in the shipping box, but you can’t remove the seat to attach them. Hypothetically.