Help with watercooling koolance case and air flow inside case.

http://koolance.com/products/pc2-601/


i just ordered this case with water cooling and i have a question about this setup. In reviews people are exausting the hot air where there are 2 places to put 80mm fans by the mobo /cpu. you can see them in the picture. Now from my understanding i thought it was better to blow cold air in? wouldnt you think?
I should have my case by next week and i plan on installing this fan check it out here http://www.coolerguys.com/cpucool/syscooler.shtml
its called the system bracket cooler which retails for 14.95 at the website. I plan on placeing this fan card right above my agp card slot blowing down onto it. While right about the agp slot you see a place to put to 80mm fans. I was going to place one fan there and blow air into the case which should be cool since its from the outside. While that is happening the system socket cooler could direct air down towards the mobo. does this sound logical .
Or should i just exhaust air all out ?

the ideal setup has equal cfm of air blowing in (from the front) and out (through the back). If air is only being blown out the back air will be drawn in the front still creating good airflow.

Good luck

?

So i should buy a good sunon 80mm fan about 32-35dba about 30-35cfm and blow air out the back. Will the system bracket fan blowing on the pci slot still work good?