Nice build, will certainly accomplish the task, up vote. RX 570s would be a consideration at this price, also concerned with the mini cooler, would suggest reallocating money on a modular/semi modular PSU for a superior GPU if possible. Stretching for a 240-256GB SSD might've been nice too.
I've bought the same motherboard but with the R1 Universal. If you consider going up to something of this size, would the extra 123mm vs 140mm width of the R1 interfere with the GPU? I'm concerned this might occur now on my setup, and I'm trying to find other builds with 140mm CPU Air coolers on this board with a GPU in the first slot.