Gotta say for a system that tight a one of these closed loop sytems may be the ticket as opossed to a pancake air cooler.
 
They are not great but preform on par with top of the line air 
 
Gettin rid of the heat the 580 will make will be paramount. \
 
This case is 15" high and 19" deep, going to roll with it 
 
Here are some I have been looking at 
 
http://www.reidsupply.com/Results.aspx?pid=10022021