To a point you get what you pay for.
Classically your looking at an Intel i5/7 with an Nvidia 5xx (by budget), the sound card may not be needed depending on what your mobo offers but the Asus Xonar is a popular choice. Dont dismiss the AMD CPU and GPU option out of hand though, it may be a notch below on the benchmarks but certainly offers comparable results for the price.
You also need to consider RAM, Drive(s) and power supply.
Are you planning on over clocking? This will influence CPU, Mobo,RAM and PSU selection dramaticaly