Hello fellow Debian user.
I would like to inform you that Debian is a great choice!
If you whole intent is gaming, I recommend getting the Testing discs since Debian (Stable) apps can go outdated pretty quickly.
If you don’t mind older apps and such, then a standard disc should do just fine.
If you need help, feel free to contact me on Matrix! Bye!
I game on stable, mostly through Steam, what is it that you upgraded to testing for?