Best Case Airflow?

[UndoingJaguar31]

So I have a Corsair Spec 01 case ( http://www.corsair.com/en-us/carbide-series-spec-01-red-led-mid-tower-gaming-case ) I currently have the 1 led fan at the front of the case and I bought 2 more led fans but I am unsure of where I should position them for the best airflow, I have 2 mounting spots at the top, 1 at top rear of the case and 1 more in the front of the case. Also tell me if they should suck air in or out.

Thanks

 

[Zerk2012]

2 front fans blowing in and one back fan blowing out.