Look under the articles page here on procooling for an article pH did about reserviors and flow rates. A well placed reservior can help keep the impeller flooded, thus increasing the available water to push. I should mention this is more noticeable on a pump where the inlet diameter is larger than the outlet diameter. A reservior also makes filling and bleeding a hell of a lot easier.
Examples of a baffle.... hmmmmmm....
Think of it this way:
Imagine a box with two open ends. Now imagine covering up the ends of the box with appropriately sized covers but placing standoffs 1" between the the cover and the box. This makes it so that air can get in, but it makes it more difficult for sound to get out. The placement of the baffle can be adjusted to the frequency of the fan's noise so that it is impossible for the sound to refract around the baffle. It can still reflect out of the box, though foam on the baffle can minimize this.
Such a baffle would not be effective on the exhaust; it would kill airflow. A design such as seen here (
http://www.performance-pcs.com/catal...oducts_id=2833)
would be more effective on the exhaust.
Clear?