Power Supplies For My New Build and Some Other Questions

i am building a new pc in the next month with the following specs...

http://pcpartpicker.com/p/oE22

and i am wondering if is hould stick with the pwoer supply on thier or go $20 cheaper and get a http://www.newegg.com/Product/Product.aspx?Item=N82E16817139028&Tpk=corsair%20600w%20builder

also will puting the 1866 ram im planning on putting in there be useful or is there no benefit over 1600 ram

one last question ive heard that the caviar black is noiesy anyone know about this?

thanks in advance

Go ahead and get the cheaper PSU.

Caviar black is as loud as any other HDD nothing unusual.