What PSU do I need?

i7 2600k @4.6ghz
P67 Asus Sabertooh motherboard
Corsair H60
Nvidia GTX 570 in SLI
16GB of Corsair Vengence DDR3 RAM
Asus DVD/DVDR drive
1TB Hard drive 7200RPM
6 120mm Fans

right now I got 1050W (people saying its over kill)
should I keep it or get like 750w psu?

EVGA recommends for a GTX570 550w with 38a on the 12v rails plus two 6-pin PCI-E power leads.
That covers the card plus the usual complement of drives, cpu, and fans.
The second card may use up to 75w for the pcie slot, and 75w each for the extra 6 pin power connectors, making a total of 775w.
Since the maximum draw is not likely, 750w should do it, but a bit extra is better to keep the psu in it's best efficient operating range.

I suggest 850w or 900w.
And, get a quality name brand such as Seasonic, PC P&C, Antec, XFX, or Corsair.

Here is a good PC P&C 910w unit for $130 after rebate:
http://www.newegg.com/Product/Prod [...] 6817703022
Or, a less expensive XFX 850w unit for $90 after rebate:
http://www.newegg.com/Product/Prod [...] 6817207011

Who cares if it is overkill? Why buy a smaller unit when you already have enough power.