Good article.
But as for me that PSU is overpriced. I have beQuiet PSU for a fraction of price of that and it's pretty quiet (I can't hear it at night), my friend has Fortron 400W, that is very quiet too, and costs less than beQuiet. Basically I'm against passive cooling - in my opinion it's a bad idea, as there are fans that make no difference from 1 meter when they are on or off (like these Arctic Cooling case fans). They don't push much air, but it's enough for, let's call it, semi-passive cooling. Airflow is much better than with passive, and noise similiar, or even the same at reasonable distance.
For me it would be better to drop price 2x and use as quiet fan as possible.