a i5 is a bit too strong for a 750ti though.
You should just wait and save up the money for an i5 and 960 together at the same time.
A g2020 probably "would" bottleneck a 750ti, but if it's only temporary it kinda doesn't matter.
If you buy the i5 now you'll have lower immediate game performance, but if you buy a 750 ti now you'll still be kinda meh when you get the i5. I have a 750ti and I like it but it's not in the same class as an i5, it's better suited to an i3.