ATI 5870 1GB - http://www.newegg.com/Product/Product.aspx?Item=N82E16814150443&cm_re=ati_5870-_-14-150-443-_-Product
I5-720 Intel Processor- http://www.newegg.com/Product/Product.aspx?Item=N82E16819115215
Ripjaw 4GB DDR3 PC1600- http://www.newegg.com/Product/Product.aspx?Item=N82E16820231277
650 Watt Power Supply- http://www.newegg.com/Product/Product.aspx?Item=N82E16817339024 (spend a few bucks more and get a name brand...but this one is working great for me)
WD 640GB 32mb cache- http://www.newegg.com/Product/Product.aspx?Item=N82E16822136319&cm_re=western_digital_kls-_-22-136-319-_-Product (the fastest standard hard drive money can buy)
X-Fi - http://www.newegg.com/Product/Product.aspx?Item=N82E16829102017&Tpk=sb%20x-fi (for those extra few frames and of course, better sound quality)
$1026.00 (averaged out...oh and fixed dollar amount. Missed stuff I already owned...lol)
(Add tower case and DVD for about $100 more...so worth it)
So, as you can see, to get the most bang for the buck with minimal to no cost...this is the way to go.
I have spent a $1000 bucks, and I am at the top of my game short of going for Dual Video cards.
Some people mention the need for an i7, but I felt the cost/performance ratio to loss really added up.
Now, once I get my video card installed, I will start pulling some numbers for this setup, and then we will start working on changes to settings, the .ini file and more..
Cheers