You my friend is RROD proof. It won't happen to you!
Reason why because you just picked up a unit that has the Falcon or Jasper motherboard. Both motherboards produce less energy meaning less watts and less heat in the system.
You have a 65nm CPU/ 90nm GPU (Falcon) or 65nm CPU and GPU (Jasper) both are high reliability and you won't have to worry about RROD.