New Setup

8GB (2x4gb) or Ram should still be more than enough if you're looking to save a little cash.

Also, to be safe, I'd go with an 850w power supply.

Here is what I'd recommend:

RAM: http://www.newegg.com/Product/Product.aspx?Item=N82E168...

PSU: http://www.newegg.com/Product/Product.aspx?Item=N82E168...

if you want to save more money... this...

psu: http://www.newegg.com/Product/Product.aspx?Item=N82E168...

ram: http://www.newegg.com/Product/Product.aspx?Item=N82E168...

650W is plenty, you'd only want an 850 if you were to SLI.

First off, I was corrected on this my first time posting, try to use this format, easier to follow and more likely to get answers: http://www.tomshardware.com/forum/261222-31-build-advice

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.

8GB is plenty as boeing114 stated. Just make sure it is 1.5v and the lowest latency that fits within your budget.
GSKILL DDR3-1600 8GB (2x4GB) CL8 ($70) => http://www.newegg.com/Product/Product.aspx?Item=N82E168...

650w is plenty for a single GTX 570 and probably enough for dual cards. If you plan on running SLI down the road a 750w unit would be good.
XFX Core Edition 750w ($85 after MIR) => http://www.newegg.com/Product/Product.aspx?Item=N82E168...

The 2600k is overkill for gaming as you won't be taking advantage of hyperthreading. The 2500k is a great gaming CPU and will save you some money.
http://www.newegg.com/Product/Product.aspx?Item=N82E168...

The Coolermaster V6GT is fine and all, but won't do much better than the $28 Hyper 212+.
http://www.newegg.com/Product/Product.aspx?Item=N82E168...

Thanks for all the feed back!  

was extremely helpful. will go for the 850w version of the TX, as i do plan on running SLI.

regards Brad!

Best answer selected by v3ngful.