dump the two 80's and put the biggest (spcr recommended) fan you can afford in the back
The exhaust fan is a Zalman ZM-F3 120mm, it's better than Antec anyway and less noisy.
In addition, put away the 80mms. If you are worried about hdd temps, you could suspend a 120mm on the inner side of the hdd cage (inside of the case, above the GPU card, pinned to the drive cage) and run it at 7v instead of those dreadfull front fans, which get severly choked by the restrictive fan grill.
I'm worried about the overall airflow in the case. In your example the fan is beating towards the HDD RACK. That means I'll have two exhaust fans killing each other as there won't be any intake fan in the case.
What is the purpose of the fan grill? Is it dust or something else?
I'm asking if it'll be safe to remove it.
I've also attached an image of the case. It was taken a long time ago but nothing changed except some minor cable management.
The HDDs are located at the very top (where those red sata cables are).