Here is something you may want to consider. I really like the Antec 3 speed 120mm fans and have two of them (one front, one back) in each of my two personal cases. You can run them either speed that is needed with a little switch that is on a wire. That way, if extra cooling is not needed, you can run them on low or medium speed and that way, they are even quieter. They are very quiet fans in the first place, even at full speed. I run both of them in each case on the slow speed, because they just move so much more air than a blaring 80mm fan. You might want to take a look at the variable speed ones for that convenience.