Get the i5 3330 and the 7770, not cause of the pcie 3.0 support(performance difference in null 3.0 vs 2.0), but cause of the other cpu is a really weak cpu vs a good quadcore.
Also not much difference between the two cards.
You could get better performance in some games with the G630+650 ti, but in the future if you want another card, you just swap the card, in the other suggestion, you'll need to swap both the card and cpu.