i just completed my new 2600k build over the weekend and its been running since fri at stock settings however its idling at 40C which seems a little high seeing that reviews around the net show it idle at 30-35C.. my ambient temp is between 25-30C...

here is my setup
i7 2600k
Asus P8P67
Thermalright Venomous X @ 70lbs (push-pull yate loons config)
Lancool PC-K62 chassis
4 case fans (2x140mm on top, 1x120mm on the back, 1x140mm on the front)
Arctic MX-2 thermalpaste
i realize that there can be many factors (ambient temp, thermal paste and etc) related to this but how can i get it below 40C?