Amd Vega cards will be here in March (at least that's what AMD promised) together with the line of Ryzen processors which leaked info has demonstrated that RX 1800 from AMD a 700 Euro processor can beat the 6930K extreme core i7 of Intel which costs more than double. So I would wait for the RX 490 video card as I am sure AMD would show us some good surprises in performance and also the price will maximum 400 USD, that card can mine many coins so worth the wait while you save a bit more money.