I agree, but if you look at the price of a decent quiet air cooler then.... Plus if you are adding case fans and a psu with a fan it kinda defeats the object. Don't think I'd be comfortable running a completely fanless standard air cooling setup unless it was very low powered - but then those systems tend to come with fanless heatsinks anyway. Its a great idea, but I'm struggling to think of where I would use one?
Yup, that's true. For the price and for silence in a HTPC, I would probably buy something like the Noctua NH-U9B SE2 or one of the Zalman low profile top down coolers.
