80c is about right while playing games. Its possible the fan profile is a bit slow in order to keep the noise down a bit. possible to you could use something like Afterburner to set a user defined fan profile that runs the fan a bit faster to get the temps lower.
You can enable manual fan control in the CCC as well but thats just a slider that would set the fan at one speed.
The HAF (High Air Flow) cases are very good in my opinion and i wouldn't hesitate in getting one. In fact my next build will be using one.