My all time favorite fan controller is this one: http://svc.com/bus-54-bk-24.html
With a small mod, you can change the LED colors to the ones you want.
I'm using a fan controller and it's great because I can make my stock case fans pretty quiet without having to buy new ones. Of course, they don't move much air, but they still function.
Haha, thats me! My Delta 120mm that I use to cool my SI-120 is SO loud at full blast. When it undervolt it, it works wonders. It's quiet and pumps lots of air out.