From the R9 270, I would wait another generation of cards to upgrade, even if your CPU is very good and can handle a better card. Since the 270 is a good card, I'm guessing you just want "faster at higher settings" instead of "I can't run this at all on my current card". Not worth upgrading an almost new card right away, at least to me, just to get another tick of quality or a tick of FPS.