I'm between 2 options and I cant decide for RAM, GPU AND COOLING.RAM:Corsair Vengeance black 16GB PC3-14900U CL9-10-9-27 (DDR3-1866) ORCorsair XMS3 Dominator Platinum DIMM kit 8GB PC3-16000U CL9-9-9-24 (DDR3-2000) ?????What should I go for? more capa...