http://www.tomshardware.com/forum/261222-31-build-advic... <----- I have never heard of that brand of psu, the gtx 560 is a sub par card, and without knowing your budget it's hard to say much. That build looks like it's more for watching movies than playing BF3 at that resolution. With that set up your going to be struggling in the FPS department.
GFX Card - Nuthin else even comes close on bang for the buck .... superb car w/ overclocking headroom up the gazoo .....Note that when paired it comes up just short of the 570 and beats the 6970. I usually can get twin 560's factory OC'd into my $1500 builds but not in Aussie dollars .... newegg links for info only.
Guru3D uses the following games in their test suite, COD-MW, Bad Company 2, Dirt 2, Far Cry 2, Metro 2033, Dawn of Discovery, Crysis Warhead. Total fps (summing fps in each game @ 1920 x 1200) for the various options in parenthesis (single card / SL or CF) are tabulated below along with their cost in dollars per frame single card - CF or SLI:
You will also note that here, the 560 Ti when overclocked beat the 570 when overclocked. A bad sample in the review might have contributed but the 560 easily OC's to over 1000MHz the 570's, if ya search the web, have had issues with VRM circuitra