Need a quiet 80mm case fan

[El Jimben]

I've got space for an 80mm fan in the bottom of my case and I'm looking for suggestions, must be fairly quiet though.

EDIT: Oops wrong forum, move pls

 

[achitophel]

Acoustifan - from Fans section on OcUK. I have two and they are effectively silent (i.e. can't even hear them over HDD noise)