I think your case needs a standatd ATX psu.
If so, look to the SeaSonic X series SS-400FL Active PFC F3 400W fanless psu.
Because it is gold rated for efficiency, it really needs little cooling.http://www.newegg.com/Product/Product.aspx?Item=N82E16817151097
Even the other gold rated seasonics have a fan controller that does not turn on the fan untill it gets a relatively heavy load.
You really don't need a strong psu unless you have a strong graphics card. A stronger gold rated unit with a fan would be the 560w unit:http://www.newegg.com/Product/Product.aspx?Item=N82E16817151098