Case fans in the corsair 450D

[nathanstrainrocks]

I have bought the corsair 450D And I have a question regarding the case fans. I know it comes with two for the front one for the back and my liquid cooler will take the top mount,

My question is, How much difference will it make if I use the two bottom 120mm mounts, Is it worth the extra power draw and cost?

 

[TechyInAZ]

If you have power hungry video cards then the slots at the bottom would be worth it.

 

[nathanstrainrocks]

If you have power hungry video cards then the slots at the bottom would be worth it.

Should the be push/pull?