Hey Kougar...you should sit beside a Tempest with all fans wide open.
I can't wait to get my new gear so I can actually hear what people are saying in the other room.
You could check out the Scythe Slip Stream's as well, Doomsday. The ones I am going for seem to offer the best CFM at the lowest db - 65CM @ 24db. Tons of air at a pretty low noise level. They can be controlled as well.