I'm still not understanding the top exhaust because it looks like the PSU blocks a good portion of the fan hole. Then again, there will be so much positive airflow that it will be pushed out the top. I don't know... Can anyone else analyze this?
Well, I was searching for fans and found the SilenX at FrozenCPU.com. So I tried looking for reviews through a Google search and all I found was forum topics. Basically, people were saying that their specs are lies/inaccurate (mostly that the noise is higher than the dBA rating). Supposedly, they even have their own employees register to forums and claim their product as the best. If I remember correctly, the SilentPCReview.com forums bash them. But, I only follow this forum, so I'll take your opinion over theirs.
Here is the
Noctua fan if you were interested/curious. They also have one with a lower RPM.