Not Herman Miller prices. I've found this review of chairs. Never heard of Boulies. I've currently got an Ikea Langfjall with a high back - find it really uncomfortable.
I'd prefer non mesh, not bothered about a head rest, and a neutral colour.
https://www.independent.co.uk/extras/indybest/house-garden/furniture/best-ergonomic-office-chair-uk-9779862.html#productId_43098