I'm considering putting a fan on top of the amp to try to draw air up through it, with some rubber spacers to stop vibration. The amp could take a fan up to about 220mm, but I'd probably go with a 140mm fan like this one, hopefully those yellow bits are soft rubber, and it has a "silent" switch to slow the fan down. I might go for a 200mm fan if I can find one that's quiet enough.
I'd run it at very low speed most of the time, and just turn it up a bit when I'm playing 1080p content.
Good idea? Bad idea?