Need a Power Supply for a ASUS GTX560 Direct CU video card.?

So under the guidance of a friend I am building a new computer myself and I have ordered a ASUS GTX560 Direct CU video card. The things a bit of a beast and I found I need a new power supply for it to work.



I need something that will give about 550 to 600 W and must be compatible with the card (i.e. the card has axillary power inputs so I guess I need a power supply that can deliver).



My first time building a comp so any suggestions on what power supply to get? Also, how do I tell what is going to be compatible with it?|||get this if you can afford it,it is also good if you want to sli tha 560 which you should later.

http://www.newegg.com/Product/Product.aspx?Item=N82E16817151088

if you not doing sli get this

http://www.newegg.com/Product/Product.aspx?Item=N82E16817371016

and it is cheaper