Best fan direction for air flow?

[Slurpee12]

I have an AZZA Genesis 9000 full tower, and the case has an additional 200mm fan mount. I've never thought of putting another fan in the case, but a friend gave me the idea so I decided to roll with it. I'm thinking of getting the Cooler Master MegaFlow 200mm fan for the mount. Now, this case has many fans, 10 to be exact. There are 2 large intake fans on the bottom of the case, and 2 large exhaust fans on the top. Then there are 2 120mm fans on both side panels of the case. The other two fans are the CPU liquid cooling setup. Question is, what direction should the new 200mm fan be? The fan would be directly across from my GPU's, so I'm thinking a push direction would be the best, being able to push out all the hot air the GPU's are giving off. Or, I could set it in pull direction and have cool air blowing onto the GPUs. Not sure what would be the best direction for air flow/cooling. What are your thoughts?

 

[babernet_1]

Two rules to airflow in case:

One, front, side, and bottom are intake, back and top exhaust.

Two, more intake than exhaust to make sure case has a positive air pressure. Cools better and keep lint out of the case.

 

[Slurpee12]

Two rules to airflow in case:

One, front, side, and bottom are intake, back and top exhaust.

Two, more intake than exhaust to make sure case has a positive air pressure. Cools better and keep lint out of the case.

Okay, then the new fan should be an intake fan.