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No doubt that way... without components.
Few degrees lower case temperature doesn't mean anything when you have to lower heatsink fan's speed lot for compensating unmuffled leaking of noise.
Magpie's nest vs. noise containing case surely makes lot more than 5dB difference to noise (decent lining lowers noise 3-4dB further from plain case) which again means easily 5C efficiency drop of heatsink:
http://www.silentpcreview.com/article759-page3.html
Also graphics cards are noisy if there's nothing to muffle their sound.
Depends on the components you use.
My Q6600 is overclocked to 3.8 Ghz at the moment, perfectly stable at about 33 degrees idle and reaching maybe 55 when I stress test it. It never goes above about 48 during normal use.
The Graphics card isn't noisy as the fan never goes above 30% and the new catalyst 9.8 drivers have made my 4870 even quieter, outside of gaming the thing is virtually silent and even then you have to pretty much put your ear to the case to hear it.
Yes I have the fans connected to the motherboard (Maximus II Formula) using the silent Q-Fan option... but why would I turn them up when my computer works as well as it does with them on silent? The fact is the air cooling in this case is so good that you don't need to run the fans at max and can hence avoid the tornado. I use decent quiet fans as well.
The hard drives are also mounted very well in this case so bar the initial spin up when the drives are being used I don't hear them at all. I use a SSD boot drive so there isn't any noise just using windows.
And if I wanted to stress the computer even more and needed the fans on full... well why would I be fussed? People who are pushing their computers as far as they possibly can rarely care about noise, and I am happy with how my computer runs at the moment.
The HAF cases are very good, you either love or hate the styling but they are still good cases that can be very quiet with no loss of performance.
It runs quieter than my P182 does and it is a similar spec system, though that is also a very quiet case, but my computer components run cooler in the HAF.
It's all a matter of preference but don't call the HAF noisy when you've not given it a proper chance.
TLDR
Good case, good temperatures, components not noisy, why run the fans on full when I get the temperatures I do already?