You must not have seen my reply in that thread:

My husband and I both have been using Tempur-Pedic office chairs for about 15 years. Starting in 2004, we both worked desk jobs from home (he still does, I only recently shifted careers) and both play video games so we have used the shit out of our chairs, and they are still good. I like that the seat is wide enough so I can fold my legs up under me if I want to.

I would steer clear of any chairs that

• function as a billboard for themselves (high back with a logo that’s clearly visible on a twitch stream)
• are built like a bucket seat from a race car
• or are otherwise marketed toward “gamers”

I would try looking for a second hand expensive one. I found a guy on CL who restores Herman Millers; sold me a lightly used Aeron for like $300.

The one I used before that was the Ikea Markus (also purchased on CL for $100, barely used).

I’ll second the suggestion of Secretlab. Pretty sure mine was in the £400ish price range, and it’s really nice for gaming.

Go part of the way through purchasing one, and then close the tab. Within a day or two you’ll probably have a discount coupon. It’s my favourite trick for buying expensive stuff.