Id probably get 8gb of ram considering the price point it's at versus the 4gb just to be on the safe side. For the motherboard you could go with a gigabyte z77-d3h, it's around 100$ and has pretty good options/ its reliable too.
Mobo that goes with Z77, MSI, Asus or Gigabyte is recommended..
4 GB Memory is okay, 8GB is recommended
SSD is a great option, you can buy HDD for storage later, but if you insist on HDD 7200rpm is recommended
i5-3570k for procie ? and no overclock ? I think you shoud get the non K (K series is for OC) you spend $ for something you don't use..
for Graphic the GT/X 680 is recommended (best with 8GB Memory)
If you aren't planning on overclocking ever then you don't need a k-series processor or a Z77 motherboard.
Also, if you don't already own the card, the 560ti has been basically superseded at its price point, meaning it's not that great a buy any more (though still a nice card).
Agree on going for 8Gb of ram, it's really cheap and there's not a good reason not to.
As for motherboard manufacturers, I'd throw ASrock into the mix as well as others mentioned. They are pretty good value compared to some of their competition, and good quality too.