Try Herbies audio labs and get the isolation devises he puts on the tube dampers as I think he sells them seperately, then I would install only exhaust fans away from any openings (doors, etc.) as I would think you would want the cool air pulled into the cabinet through the non sealed openings, across components then exit via the fans. Maybe one at each end on the sides of the cabinet.
ventilation fan vibration isolation help needed
I will be putting two exhaust and one injection fan in my cabinet to properly move air. Two will be mounted horizontally and one veritically. The trick is that I work so hard to get the cabinet isolated from vibrations that by adding a fan, I'm added micro vibs to the cabinet. The fans are 4" radio shack fans running at 6 volts instead of 12volts in order to slow them down and reduce noise yet still move air. I was planning on using placing a sorbothane grammet (if I can find some) around the screw that is screwed into the cabinet and it would hold the fan about 2mm off the cabinet. Any other suggestions. I want to keept it simple but yet very effective. Thanks Troy