Raiddinn :
There is a difference between quiet and silent, btw.
1000 RPM fans are quiet, but not silent.
I have 120mm fans that run at 2000+ and even that is not what I would qualify as loud.
I think that our two contrasting statements/opinions, illustrates the point that people perceive noise differently. But surely if someone wants a quiet unit then they want to reduce fan speed as much as possible, and truly quiet PSUs have much lower idle speeds than 1000RPM.
XXStavrosXX :
CoolerMaster GX 650W is also another solid candidate.
No it is not. I've seen reviews where the idle speed was shown as 1000 or 1100RPM.
Reviews for the GX-650W:
http://hardocp.com/article/2010/11/22/cooler_master_gx_650w_power_supply_review/ (old, discontinued Seventeam built one)
http://www.techpowerup.com/reviews/CoolerMaster/GX650W_Bronze/
http://www.kitguru.net/components/power-supplies/zardon/cooler-master-gx650-bronze-power-supply-review/
(These are for the newer, Enhance built one.)