I would suggest you did not invest in a bay cooler, but probablly a better CPU FAN & HEATSINK - wait till you get them and also if you can use your BIOS or a program to monitor your temperature.
Unless you have like a really hot (as in the temp) graphics card, a heavy breathing HDD and anything else thats going to warm you up, I wouldnt suggest a bay cooler just yet.
See how you go,
P.S IF in doubt, make sure you PC is set to shutdown after it reachs a critical temperature. (Usually available in the BIOS)
"The problems that exist in the world today cannot be solved by the level of thinking that created them" Einstein...