Could the 2120 handle it without dropping below 30 fps?
It should be able to do that, at least, yeah.
Also, you don't need to worry about an i7 for gaming. An i5 is all you'll need. HT isn't all that beneficial in gaming (and is actually detrimental, in some cases).
If you can swing the extra cash for an i5 right now, though, that's
what I would really recommend.