[Solved] PSU Needs

Hello,
I'm building a new PC and I'm trying to calculate my PSU needs. Now I've used a couple of the online calculators like the one Thermaltake provides on their website, but I'm not sure about their results. So I need some help trying to figure that part out.

Here is the makeup of the PC.

CPU: i7 2600k
MB: Asus P8P67 Deluxe
Video: 2x MSI 560Ti
RAM: 2x 4GB Corsair Vengeance 1600 MHz
Cooling: Corsair H70 Watercooling
HDD: 6x SATA2/3 (1 x WD Black, , 3x WD Blue, 2x WD Green)
Other: DVD Burner, 3-4 USB Devices

I'm thinking of using with the Cooler Master Silent Pro Gold 1000W, but according the calculators, I'm going to be needing just over 1000w!
According to some of the guides I read on Tom's, 850w should be enough, so I figured go with a 1000w for some future proofing.

Also, I'm going to be using the Corsair 700D case. I'm little concerned about the size of the case and PSU cable lengths. If anyone has any experience with that, please do share!

Thanks in Advance for Your Assistance!


**Edit/Update: I'm still reading and just read that I'm an idiot and have been looking at Wattage, when I should be looking at Amperage, but either way, the question still stands.

850W with good amp should be enough. Just make sure they have high amps on the 12 rails since you're running two gpus.

Go for Single Rail. 1+ is fine if the brand is good.

If i had your build i woulda bought a Corsair 1000W. Good amp on both rails.

Futureproof and good for overclocking stability.

http://www.newegg.com/Product/Prod [...] 2D003%2DTS

XFX Black Edition XPS-850W-BES 850W
http://www.newegg.com/Product/Prod [...] 6817207001

Thanks for the answers peeps. Very helpful.

Very interested in the Corsair HX 1000W as there are some really good reviews on it.
I have an Antec Quattro 850W laying around right now and it's still working fine. Being that it's an older PSU, would there any problems with it running new videocards like the dual 560 Ti, Sandybridge chipset & the i7 2600k?

@ Emperus - Reviews have said that the cooling should be fine, especially being that I'm watercooling - Any alternative case suggestions? (FYI, I like classy simple, looking cases!)

Corsair hx 1000 is outdated and beaten by cheaper power supplies.and you only really need bout 650-750 watts max

My initial thought was you relying on air cooling with the 700D.. For water cooled setups, the Obsidians are perhaps the best cases in the market.. So no problems with the case now..

Best answer selected by aviavy.