Also, I would suggest a higher wattage PSU, especially if you plan to OC at some point and add a second GTX570, that'll be drawing a fair amount of power.
I have a i5-2500k and a GTX560 Ti that I plan to SLI and I initially went for the TX750 v2, but was able to get the TX850 for $10 more, so I have a huge power ceiling now to add basically anything I want down the road.
Couldn't have said the rest better myself.
Also, try running your setup through this http://extreme.outervision.com/PSUEngine
I ran a guess at your setup and was hitting just over 650 watts, so as sadams04 said, if you want to future proof it more, go a little higher on wattage.