thanks for the replies... I friend of mine said that if I'm not going to oc, I shouldnt need a case fan at all with this setup. And there's not really much diffrence with the case closed/open.
I opened the case again to see if the power supply was blowing hot air to the CPU or if it was just too close. Doing this I found out that the CPU fan doesnt really move much air... Even the graphics card fan seems to move more (when I place my hand above/under) the fan. Does this seem normal? My common sense is saying NO!
edit: I was wondering if the CPU fan should blow air to the heat sink or suck it away from the heat sink?