Yes that looks to be pretty much the standard gaming build now, probably still will be for a while. Looks good to me, good luck with it. One relatively cheap but good improvement though would be to get a Caviar Black hard drive, theyre faster. I wouldn't change anything there to get it, just do it if you have the budget.
The factory OC'd 560 Ti's perform very close to the 570's. 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) for the various options (single card / SL or CF) are tabulated below