Today 2 cores w/ ht is a good option for a budget gaming build.
In this gaming build i3-4130 has one job only: It has to deal with the Radeon R9 280. Can i3-4130 do it? Yes.
FX-6300 + good mobo + good cpu cooler are a great option for a budget gaming build too. But you must oc.
Some day 2 cores w/ ht will be a bad option for a gaming build. But you will have a ASRock H97 PRO4 exactly for this contingence: when that time comes, you will have to upgrade your gaming build with i5 or i7.