Aurora R7, liquid cooling unit

I am seriously considering purchasing an Aurora R7 but need to know which Asetek cooler Alienware is using. This is an important question since Alienware is only using a 120mm fan/radiator combo to cool the 8700K. 

The standard Asetec 550LC uses a standard 25/30mm radiator whereas the 570LC uses a double thick 50/60mm radiator and would be significantly more effective