you shouldnt have a it above 40 idle. get an exhaust fan, that was probably ur problem, you have more intake fans then exhaust and the airflow was f'd up. by an exhaust fan and add that side fan again and see what happens. and then try it without the side fan but WITH the extra exhaust fan.
Oh! Don't say that you have me wanting to cool again!
I might get some more fans at some point, allthough i think i'll only be able to install blowers from now.
I currenlty have a 120mm in at the front of the case and a 120mm out at the back. The PSU has a massive fan, i think 120mm, althought the are some slots which seem to blow a small amount of air into the case. I tried covering them for a short while, but didn't make much difference.
I've tryied turning around my side fan, didn't seem to be alot in it. Infact while its turned off i think it tends to suck more air in. The grid that it comes with however doesn't allow much movement, its a black grill with small holes. Half the air flow and fan speed when fan is in place so might remove that.
However, the case doesn't seem to be hot, the air its kicking out at the back is what i'd expect from my old P2 pc. Top of the case possibley a tad warm, but can't deal with that easily.
Not that its such a issue i am surprised that this Artic Cooling Freezer 64 pro isn't taking more off the cpu. I havn't put my pc under mega load yet, but i don't think it will go above 47/48 so its keeping it in the range. I'm wondering in the stock cooling would be better, athough i'm not changing. \