Just AH
Then here is my opinion (experts, correct me if im wrong, please):
Build it yourself and save a load of money.
That I5 3570K is a great CPU, enough for anything. But do you really need that TUF Sabertooth board? Thats a very good one, but select what do you need and what you dont.
I would buy a mATX board with only one PCI-E slot as one top end VGA can handle this game easily with all the eye candy, in full-HD. 8GB RAM is enough for anything but serious rendering, i dont see the point in buying more for AH. For one VGA, a 550-600W quality PSU is enough, even if you decide to OC it - but you wont have to. Also, i wouldnt recommend the water cooling; its some cool stuff, but a decent, 50$ cooler can handle any CPU, under any circumstances. I have a 40$ Cooler Master Hyper212 for my old 95W PhenomII, it never goes above 65 celsius, not even when OC-ed like crazy in the summer, and does its job in complete silence.
As for the VGA, a GTX660ti/760 or a HD-7870 can run this game just fine, and will be able to do this for a good couple years.