I have the ARCTIC MX-2 thermal compound completely satisfied with the above configuration in use and am!
In Idle temperatures are around 25 ° C, under full load with Prime95 at about 45 ° C with Turbo mode (3.8GHz).
I recommend before applying the WL-paste these to lay for about 5-10 minutes on a warm heater, as this can pass better on the processor the paste.