Like Eagle said the Vantec Tornado, if you want loud and I do mean LOUD. I have one just sitting in my computer desk in the box because it's so loud. It's the 92mm and moves 119CFM at full bore, the 80mm moves like 90CFM. Thats big time airflow as long as you don't mind not being able to think because of the noise. Also Antec puts out some highoutput fans that are a bit on the loud side.
http://www.vantecusa.com/product-cooling.html#
http://www.vantecusa.com/product-cooling.html#
