I used a DXRacer chair for ~4yrs., (probably 3yrs. more than I should have). It was a gift and wasn't actually the type of chair I wanted at the time (but I had been researching them... and this is what my partner noticed. She didn't realize that I had decided I was going to go with a different type of chair, lol.)
I forget the name of the model but it was their best one (heavy duty rated at 400lbs), all the features + 3" rubber casters/wheels.
I found the seat to be a bit narrow and the 'bolsters' on the seat have a metal bar in them and this was pressing on my hips at times. Really unfortunate as I loved the rest of the chair. Just the actual seat part was lacking

(also not enough cushioning on the seat imo).
Currently I'm using the chair I had prior to the DXRacer. It was a half decent computer chair from an office supply store... but the back had broken off of it. I've been using it again for ~1yr. It's close to 20yrs. old, the seat cushioning is packed down but it's still more comfortable for me than that DXRacer chair.
Something I noticed with computer chairs & especially while playing online poker. I never use the back of the chair. I mean maybe during the 5min. break I might sit back in my chair for a few seconds but that's about it.
My suggestion.
Go to a place/store where you can sit in some chairs so you'll know what you want.
Chairs can be quite expensive. For my next one I'm thinking of purchasing it off of Facebook Marketplace. Sometimes some businesses will close up shop & then will sell off their office equipment. Great way to pick up a desk &/or a chair!
Speaking of which... I think I'll go take a look right now.
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