I could never get my old Antec 1040 quiet enough even using 80mm Panaflow L1A case fans. Bought a Antec Sonata that uses 2 120mm fan's under volted and it's finally at a noise level I can except vs case cooling needs. I can actually hear the low humm from my 21" monitor it's so quiet now
So if your going for quiet you might need a case that uses 120mm fans.