You might check out the products from Active Thermal Management -- www.activethermal.com.
Their stuff seems kinda expensive for what it is, until you get it set up and running . . . they're extremely quiet. They will also spend the time with you on the phone to make sure that a particular product fits what you're trying to do, and that your installation will be done in a fashion to make it work properly.
Their stuff seems kinda expensive for what it is, until you get it set up and running . . . they're extremely quiet. They will also spend the time with you on the phone to make sure that a particular product fits what you're trying to do, and that your installation will be done in a fashion to make it work properly.