Given the uncertainty of things from now to 2019 it is hard to say. Your gpu choice will likely be ok. But given Intel's current cpu process issues that are leading them into a 2019 with an uncompetitive product lineup your cpu choice might not be the best. Given how close the 2600x and 2700x are to the 8600k and 8700k a perceptible 3600x and 3700x with extra clockspeed, cores, and clockspeed will leave intel in a bad position. Especially with no signs of a pending large core cannon lake based chip in sight. But we still have a year to go for real answers but Intel hasn't provided much in the way of confidence.