The Active Thermal link Lasher provides has some really interesting products. I wonder about cost. Middle Atlantic Products also makes fans for gear racks. In other threads, Gonk (I think) suggested a chimney-type cooling arrangement.
I have 5 3.25" fans from Parts Express that were less than $10 each. They are wired into a box with lighted rocker switches. Inside a cabinet open only to the front, a fan will drop the temp on top of an amp from over 100 degrees to 80 degrees within 30 seconds. When everything else is quiet, the fans can be heard, but I have never been bothered by the fans while listening to a movie or CD.
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Michael Stano
Outlaw 950
Parasound HCA 1000Ax3
Klipsch KG 3.2s frt & rr
Klipsch KV 3 ctr
Klipsch KV 2 surr ctr
SVS PB2
Sony CDP-CX355 CD
MonsterPower HTS2500MkII
Mitsubishi DD 8020 DVD
Mitsubishi 46" 16:9 TV