This is very subjective answer and will depend on your entire system, including the room where you listen music, on the quality of the files you have (lossy, lossless, high rez), on the type of music you listen and not the last, on your habits and expectations when it comes to critical listening.
People searching for improvement in their audio systems look mainly to more realistic display of the music, compared with a live performance; many times you get only a fraction of improvement while spending some good money; for some people this fraction of improvement is worthy, for others not.
Do not buy based on reviews. Go to a dealer, ask if you can compare your source with the player, and judge with your ears.