Will this cause a negative airflow?

[Mortac]

So I've just ordered a Dark Base Pro 900 that comes with two 140 mm Silentwings 3 fans in the front blowing in, and one of the same in the rear blowing out.

For CPU cooling I went with a Kraken X62 which comes with two 140 mm fans. This will be mounted at the top of the case.

Now, my problem/question is regarding a positive/negative airflow in my case. I want to achieve a positive airflow because I usually have a lot of dust in my home (bad cleaning habits). I will buy one extra Silentwings 3 fan to mount in the front of the case which means a total of 3 x 140 mm fans blowing in. It looks on paper as if this will still cause a negative airflow in the case since the X62 fans seem to move more air. However, since it has a cooling block to pass through this should surely prevent it from reaching it maximum potential airflow, right?

This sums down to two-and-a-half questions:
1) Do you think this case will have a positive or negative airflow?
2a) Should I replace one of the Silentwings 3 fans with the high speed version?
2b) If I get one high speed version, how will that interact with my non-high speed fans? If I have a fan controller, can I control these individually?

What are your opinions and recommendations to ensure a positive airflow?

 

[CountMike]

There's no such thing as "Negative airflow" there's positive and negative air pressure in a case. In any case there's very little difference, you better use filters for intake fans, they would do much more.