As I see it, these are probably your best 3 options. The processor will perform nicely in gaming and wont limit your 560Ti in any way. The motherboard is GEN3/PCI3.0 ready, and it will take a second card in SLI should you ever want to. It will also enable you to upgrade your processor to an i5/i7 or IVYBRIDGE in the future. 8GB 1600MHz RAM is the best bang-for-buck RAM currently and will go really nicely with i3-2100 and z68 motherboard.
Giving you a final build of:
ASRock Ex3 GEN3
650w Corsair PSU
8GB 1600MHz RAM
^^ Looks a pretty damn good build to me with lots of future potential should you ever want to upgrade again.