funneling heat away from the inside of a box

[Technomage]

ok,
I am having some serious problems with the heat (I live in a swamp cooled 
house here). my machine got so hot yesterday that both HD's "disappeared" 
from the system and the cpu went bonkers. the only way I have found to keep 
the machine cool enough involves the use of a squirrel cage fan (those little 
construction units that can be purchased at sams club).

what I need is something a little more permanent that can move about 1500 cfm 
through the case.

any ideas?