(older pic of my case, before i did a bit of cable management)
My thought was because of the fan in the very front of the case blowing on the harddrives that it was probably not getting a lot of air so i thought to add another fan on the other side of the harddrive cage to help force air from one side to another.

I will look into the thermaltake extreme. Is that the full name of the heatsink? Or is it extreme volcano?