I considered that, but I think the noise would be a bit more muffled in that case.  Hard to say until I open it.  With that said, I'm mining with it at home right now and its not loud enough to be an issue.  When I move it to my datacenter it won't matter at all.

As I mentioned they are extremely tolerant to warmer operating environments ... unlike the FPGA singles.  I have to run secondary cooling (a room fan to keep them running consistently in warmer temps).