aflca is health insurance. hate it when they spend millons on advertizing and you still don't have a clue of what there selling. I know someone that has there health insurance and they pay you if you have to go to the hospital.
now that we are on the subject of ducks. Look at the temps I'm getting with my duct did a little expermenting best of all it quietier. using 120mm fan at one end and a delta 80mm at the other I think there sounds are somehow cancelling each other out. removed the fan from heatsink completely. this is about as close as your going to get to watercooling.