SPCR

So I am ordering the parts for my new rig, at the moment I got this:

I5 3570K
2X4GB CL8 G.Skill Ripjaw
Asus P8Z77-v Pro
Gfx ? Still thinking about this one
Corsair 550D
Megahalems + Scythe PWM fans

The only thing whats left for me is a really good PSU, since I want to make the machine as quiet as possible I don't care about the price. Also I don't care about the wattage I want the PSU to be real silent on low load. Electronical noise is important to as some have it more then others.. might be a lucky thing to though don't know!

I am debating between some:

Super flower golden king 550w (reviewed by jguru)

Seasonic Platinum 860 or 1000

Seasonic x 1050

Seasonic x 560/760 etc ...

Help me choose

The quietest PSUs I've tested are...

Kingwin (Super Flower) STR-500 platinum fanless -- dead silent w/ trace of buzz near full load
Kingwin (Super Flower) LZW-550 Platinum -- similar to above, fan does not spin below 500W
Seasonic X1050 -- fan does not spin below 500W, no electronic noise at all
Kingwin LZW-1000 Platinum -- like Seasonic X1050
Most Seasonic X series PSUs I've used are dead silent till the fan kicks in, which does not happen till >250~300W load (depending on your ambient temp & exact case cooling setup). But others have reported some electronic noise from some samples.

Cautions --
1. The above comments are based on my observations of single samples in my lab. There is bound to be some variance; some other samples might exhibit slightly different characteristics, which you could notice if the rest of your system is as silent as these PSUs.
2. Electronic whine is sometimes constant in a PSU, but you need to be aware that in many cases, it is interactive. A PSU may make no noise at all with most combinations of components, but suddenly start to whine or buzz with the addition of a new component in the system. The single most common whine-causing component is the video card. So be prepared to swap out components if you encounter electronic noise with any highly rated PSUs like the ones above.

Thanks for the input MikeC, I decided to order the Super Flower since I will never use 1000w and the SuperFlower seems to be the best all round PSU at the moment for a decent price if you ask me. I just hope the PSU doesnt have to much electrical noise.

You're probably going to be happy with your choice. Actually any of the ones you mentioned will probably satisfy.