My suggestion is to just get a comfortable office chair, most "gaming chairs" aren't really anything special unless you're buying one of those absurdly expensive Herman Miller chairs. Biggest issue I had with one of those gaming chairs is it legit hurt my tailbone real bad, which isn't good as I had surgery on that area of my lower back twice already so it's a sensitive spot. Switched to an office chair and that area of my lower back doesn't hurt nearly as much during extended sessions (but obviously still get up and move around semi regularly).