Depends on your budget. The Ryzen 2700 is less expensive (here in the US) than the Core I5-9600K. The Ryzen processor also comes with a stock cooler. The Intel Core I5-9600K does not which adds even more to the overall cost. Finally, AMD motherboards tend to be less expensive as well.
So again, it boils down to your budget (and the prices in your location). If you can get the Intel processor AND the graphics card you want, then it's a no-brainer. If you have to sacrifice a level of GPU in order to get the Intel processor, then I'd say go with the AMD set up (or maybe wait until the 3rd Generation Ryzen processors are released).
-Wolf sends