What is a good setup for case fans

Solution
I would mount both fans as either input or exhaust.
Two as input would be best if the case permits.

Otherwise, mount two as exhaust either in the back, or on top.
Two 120's are ok, or, one 120 and one 140 would be good too.
I would mount both fans as either input or exhaust.
Two as input would be best if the case permits.

Otherwise, mount two as exhaust either in the back, or on top.
Two 120's are ok, or, one 120 and one 140 would be good too.
 
Solution