For those going the dual PSU route and using a desktop case I would recommend this case. http://azzatek.com/csaz-9000-techspec.html It keeps things VERY cool. I have been using it with a passive cooled Xeon setup. The case keeps the airflow going so nicely that I don't even need CPU fans.
There certainly are other options. But this is one of the few that support DUAL PSUs. If you are using this in a home setup. Can even work in a server room as well but I recommend more for the use of a home setup. The sound suppression is pretty good as you can have quite a few fans going in there and it keeps things quiet. I had 4 GPUs in there (for gaming) at one point.

Obviously YMMV with this but considering the amount of fans on the cage, a case that suppresses sound better would be in order. Seems like the best option at this point for most. Might also be something AMT can offer to customers as well as an option (after some testing) would likely solve the whole nuclear explosive miner thing people are going on about (just ratcheting up the exaggerations and out of context comments). This offers a solution.