Okay so it's been a over 2 weeks since I've put together my build. My cpu is a i3-2120 and my cooler is a hyper 212 evo and I've used the thermal that came with the cooler. During the first week I've seen low temps of 32-30 during idle and now it's usually hovering around 34-36. Is that normal? I expected it to stay lower as the thermal "broke in" or whatever lol. Also it's in a push-pull config, using the fan that came with it and a rosewill one. Also my case is a cooler master storm scout.
...also, sometimes when you think it's idling, there may be processes going on in the background you're not aware of. A pgm like Core Temp will tell you the core temps and let you see what percentage of CPU usage is happening at the same time.