Right, thanks for the additional info I should have noted myself!
I Use AeroCool XtremeTurbine's in front and back, great air flow and not too loud at all >>>
Newegg.com - AeroCool XtremeTurbine-Blue 120mm Case Fan - Case Fans
Pricey a bit, but I like em alot
If you are short on cash, I would suggest some Yate Loon D12SH's from Petra's >>>
http://www.petrastechshop.com/120x25mmfans.html
or D12SM's if you want a bit less Airflow or do not have a controller. But even the H models are pretty quiet. I use these on my Rad's