@Erasmus your CPU temps do look a bit high and I would think you should be able to get low 30's at idle. My overclocked 920 i7 runs about high 20's at idle and low 50's under full load.

My case deosnt have the greatest air flow either with 140mm fans front and rear and 120mm fan on the CPU cooler

Might depend which thermal paste you use and how you applied it to the CPU and of course if you have AC on in the room LOL

Also worthwhile to enable the cpu Speedstep so that the CPU voltage and frequency drops at idle, this reduces temps by up to 5degC